odroid-c2: README: MMC is supported

Mention eMMC and microSD as supported devices.

They have been enabled with patch
d0c5c8d529f16fa88ab52a3b5dd2d4fc03664f19
odroid-c2: enable new Meson GX MMC driver in board defconfig
which was accepted for u-boot-mmc.git.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
1 file changed