Add DWC2 cache maintenance routines for STM32 #601

Job	Run time
set-matrix	3s
hil-hfp	4s
build (esp-idf) / family (-b espressif_p4_function_ev)	7m 13s
build (esp-idf) / family (-b espressif_p4_function_ev -f1 CFG_TUD_DWC2_DMA_ENABLE -f1 CFG_TUH_DWC2_DMA_ENABLE)	7m 15s
build (arm-gcc) / family (-b feather_nrf52840_express)	35s
build (esp-idf) / family (-b espressif_s3_devkitm)	7m 11s
build (arm-gcc) / family (-b max32666fthr)	1m 37s
build (esp-idf) / family (-b espressif_s3_devkitm -f1 CFG_TUD_DWC2_DMA_ENABLE)	7m 10s
build (arm-gcc) / family (-b metro_m4_express)	32s
build (arm-gcc) / family (-b lpcxpresso11u37)	24s
build (arm-gcc) / family (-b ra4m1_ek)	27s
build (arm-gcc) / family (-b raspberry_pi_pico)	58s
build (arm-gcc) / family (-b raspberry_pi_pico2)	53s
build (arm-gcc) / family (-b stm32f072disco)	1m 12s
build (arm-gcc) / family (-b stm32f723disco)	1m 5s
build (arm-gcc) / family (-b stm32f723disco -f1 CFG_TUH_DWC2_DMA_ENABLE)	28s
build (arm-gcc) / family (-b stm32h743nucleo)	27s
build (arm-gcc) / family (-b stm32h743nucleo -f1 CFG_TUD_DWC2_DMA_ENABLE)	25s
build (arm-gcc) / family (-b stm32g0b1nucleo)	25s
hil-tinyusb	1s
	38m 25s

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