This commit adds the feature where the TWAI ISR will continue to
run even if the cache is disabled. Whilst cache is disabled, any
received messages will go into the RX queue, and any pending TX
messages in the TX queue will be transmitted. This feature should
be enabled using the CONFIG_TWAI_ISR_IN_IRAM option.
esp_system: removed repeated interrupt allocator code and moved common code to esp_system
xtens: moved xtensa specific code from freertos to the xtensa component
hal/interrupt_controller: added interrupt controller hal and ll files
docs: update the doxyfile with new location of esp_itr_alloc.h file
xtensa: fixed dangerous relocation problem after moving xtensa interrupt files out of freertos
docs: removed Xtensa reference from intr_allocator api-reference
xtensa: pushed the interrupt function that manages non iram interrupts to the xtensa layer
esp_system/test: fixed platform dependent setting for intr_allocator tests
hal: rename the functions used to manage non iram interrupt mask.
