ARM: at91: ma5d4: Init SD/MMC controller in SPL

Init the controllers, otherwise the board cannot boot from SD/MMC.
This boot option is new on rev. 2.1 SoM .

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Andreas Bießmann <andreas.devel@googlemail.com>
1 file changed