Enhance the stm32_dmacapable implementation to give correct answers.
Fix the Kconfig configuration for the STM32 SDIO DMA priority option.
Teach the STM32 SDIO driver how to determine whether a transfer can be performed safely using DMA.
Teach the MMC layer to handle errors reported during DMA setup.
Teach the FAT filesystem how to deal with I/Os that can't be handled due to DMA non-conformability.
Fix DMA channel definitions for UART7/8
Add an explicit preflight call for SDIO DMA operations, since we can't error out of the DMA setup (the card is already committed at that point).
USB MSC host class driver: Don't bother retrying to initialize the FLASH if the interface is returning fatal transfer errors
Beginning of support for USB host side tracing
USB monitor extended so that it can also be used with USB host trace data
Extent the the USB host trace logic to include verbose debug output
SAMA5 EHCI:  Did not work with DEBUG off.  Appears to be because of some D-Cache flushing that was performed only with DEBUG ON.  Now is unconditional
Fix a reference counting error in the USB host mass storage class
SAMA5:  Add tracing support to the OHCI driver
Clean-up a few USB trace formats
SAMA5D3x-EK demo configuration now supports HSMCI0 and HSMCI1
SAMA5: TWI register definition file
SAMA5: Framework for a TWI driver (incomplete)
Missed de-optioning the DMA preflight check.
SAMA5:  Barebones TWI driver implementation