Add support for DENX MA5D4 SoM and MA5D4EVK board, based on the
Atmel SAMA5D4 SoC. The SoM contains the SoC, eMMC, SPI NOR, SPI
CAN controllers and DRAM, the baseboard contains UART connectors,
ethernet port, microSD slot, LCD header, 2x CAN connector and a
lot of expansion headers.

Signed-off-by: Marek Vasut
Cc: Andreas Bießmann
Reviewed-by: Heiko Schocher
Reviewed-by: Andreas Bießmann