ARM: mach-shmobile: ap4evb: update MMC/SHDI tiny document

MMC0/SDHI1 (CN7) can be selected by dip switch.
And card voltage can be selected by jumper pin.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
1 file changed