fix(esp_phy): Allow WiFi/USB interference workaround option only on supported targets

"Enable USB when phy init" Kconfig option would call esp_phy function
`phy_bbpll_en_usb()` that is not implemented for all targets.
Selecting this option for unsupported target results in linking error.

The necessity of this workaround is now defined soc_caps.h rather than
in the Kconfig.

Closes https://github.com/espressif/esp-idf/issues/12185

components/esp_phy/Kconfig

@@ -106,13 +106,20 @@ menu "PHY"
             When brownout reset occurs, reduce PHY TX power to keep the code running.
 
     config ESP_PHY_ENABLE_USB
-        bool "Enable USB when phy init"
+        bool "Keep the USB PHY enabled when initializing WiFi"
-        depends on SOC_USB_OTG_SUPPORTED || ESP_CONSOLE_USB_SERIAL_JTAG || ESP_CONSOLE_SECONDARY_USB_SERIAL_JTAG
+        depends on SOC_WIFI_PHY_NEEDS_USB_WORKAROUND
-        default y if IDF_TARGET_ESP32C3 || IDF_TARGET_ESP32S3
+        default y if IDF_TARGET_ESP32C3 || IDF_TARGET_ESP32S3 \
+            || ESP_CONSOLE_USB_SERIAL_JTAG || ESP_CONSOLE_SECONDARY_USB_SERIAL_JTAG
         default n
         help
-            When using USB Serial/JTAG/OTG/CDC, PHY should enable USB, otherwise USB module
+            On some ESP targets, the USB PHY can interfere with WiFi thus lowering WiFi performance. As a result, on
-            can not work properly. Notice: Enabling this configuration option will slightly impact wifi performance.
+            those affected ESP targets, the ESP PHY library's initialization will automatically disable the USB PHY to
+            get best WiFi performance. This option controls whether or not the ESP PHY library will keep the USB PHY
+            enabled on initialization.
+
+            Note: This option can be disabled to increase WiFi performance. However, disabling this option will also
+            mean that the USB PHY cannot be used while WiFi is enabled.
+
 
     config ESP_PHY_ENABLE_CERT_TEST
         bool "Enable RF certification test functions"

components/soc/esp32c2/include/soc/Kconfig.soc_caps.in

@@ -711,6 +711,10 @@ config SOC_WIFI_SUPPORT_VARIABLE_BEACON_WINDOW
     bool
     default y
 
+config SOC_WIFI_PHY_NEEDS_USB_WORKAROUND
+    bool
+    default y
+
 config SOC_BLE_SUPPORTED
     bool
     default y

components/soc/esp32c2/include/soc/soc_caps.h

@@ -324,6 +324,7 @@
 #define SOC_WIFI_HW_TSF                           (1)    /*!< Support hardware TSF */
 #define SOC_WIFI_FTM_SUPPORT                      (1)    /*!< Support FTM */
 #define SOC_WIFI_SUPPORT_VARIABLE_BEACON_WINDOW   (1)    /*!< Support delta early time for rf phy on/off */
+#define SOC_WIFI_PHY_NEEDS_USB_WORKAROUND         (1)    /*!< SoC has WiFi and USB PHYs interference, needs a workaround */
 
 /*---------------------------------- Bluetooth CAPS ----------------------------------*/
 #define SOC_BLE_SUPPORTED               (1)    /*!< Support Bluetooth Low Energy hardware */

components/soc/esp32c3/include/soc/Kconfig.soc_caps.in

@@ -1039,6 +1039,10 @@ config SOC_WIFI_SUPPORT_VARIABLE_BEACON_WINDOW
     bool
     default y
 
+config SOC_WIFI_PHY_NEEDS_USB_WORKAROUND
+    bool
+    default y
+
 config SOC_BLE_SUPPORTED
     bool
     default y

components/soc/esp32c3/include/soc/soc_caps.h

@@ -439,6 +439,7 @@
 #define SOC_WIFI_CSI_SUPPORT                (1)    /*!< Support CSI */
 #define SOC_WIFI_MESH_SUPPORT               (1)    /*!< Support WIFI MESH */
 #define SOC_WIFI_SUPPORT_VARIABLE_BEACON_WINDOW   (1)    /*!< Support delta early time for rf phy on/off */
+#define SOC_WIFI_PHY_NEEDS_USB_WORKAROUND   (1)    /*!< SoC has WiFi and USB PHYs interference, needs a workaround */
 
 /*---------------------------------- Bluetooth CAPS ----------------------------------*/
 #define SOC_BLE_SUPPORTED               (1)    /*!< Support Bluetooth Low Energy hardware */

components/soc/esp32s3/include/soc/Kconfig.soc_caps.in

@@ -1335,6 +1335,10 @@ config SOC_WIFI_SUPPORT_VARIABLE_BEACON_WINDOW
     bool
     default y
 
+config SOC_WIFI_PHY_NEEDS_USB_WORKAROUND
+    bool
+    default y
+
 config SOC_BLE_SUPPORTED
     bool
     default y

components/soc/esp32s3/include/soc/soc_caps.h

@@ -532,6 +532,7 @@
 #define SOC_WIFI_CSI_SUPPORT                (1)    /*!< Support CSI */
 #define SOC_WIFI_MESH_SUPPORT               (1)    /*!< Support WIFI MESH */
 #define SOC_WIFI_SUPPORT_VARIABLE_BEACON_WINDOW   (1)    /*!< Support delta early time for rf phy on/off */
+#define SOC_WIFI_PHY_NEEDS_USB_WORKAROUND   (1)    /*!< SoC has WiFi and USB PHYs interference, needs a workaround */
 
 /*---------------------------------- Bluetooth CAPS ----------------------------------*/
 #define SOC_BLE_SUPPORTED               (1)    /*!< Support Bluetooth Low Energy hardware */