UPSTREAM: clk: rockchip: fix wrong mmc phase shift for rk3228

UPSTREAM: clk: rockchip: fix wrong mmc phase shift for rk3228

mmc sample shift is 0 for rk3228 refer to user manaul.
So it's broken if we enable mmc tuning for rk3228.

Fixes: 307a2e9ac ("clk: rockchip: add clock controller for rk3228")
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Reviewed-by: Xing Zheng <zhengxing@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
(cherry picked from git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip.git
v4.8-clk/next commit bb07698fc8d13ec74f4f5bd87b04953777ee6982)

Change-Id: I9bb7e18fe8c1cdb5661219f078f4992de7ad06bd
Signed-off-by: Xing Zheng <zhengxing@rock-chips.com>