The changes only related to C6 and H2 chips where CONFIG_SOC_IEEE802154_SUPPORTED=y.
For this case these APIs return 8 bytes
esp_efuse_mac_get_default() -> 8 bytes
esp_efuse_mac_get_custom() -> 8 bytes
esp_read_mac(..., ESP_MAC_IEEE802154) -> 8 bytes
The rest cases len is 6 bytes
Some esp32s2 chips was burned with one MAC address by mistake.
The MAC address code contains a special case for these chips,
update MR to handle this special case.