fix(plat/rcar3): fix eMMC boot support for R-Car D3

Fix to support of booting from eMMC (50MHz x 8) on
Draak board for R-Car D3.

Signed-off-by: Hideyuki Nitta <hideyuki.nitta.jf@hitachi.com>
Signed-off-by: Toshiyuki Ogasahara <toshiyuki.ogasahara.bo@hitachi.com>
Signed-off-by: Yoshifumi Hosoya <yoshifumi.hosoya.wj@renesas.com>
Change-Id: I0ab2b5c7f8075acbf5f4a69694fb535dddc1a4c8
1 file changed