ARM: at91: ma5d4: Enable support for booting from eMMC

The SoM has been redesigned to work around bug in the SoC and is now
capable of booting from the eMMC. Add support for booting from eMMC.

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