UPSTREAM: clk: rockchip: release io resource when failing to init clk

UPSTREAM: clk: rockchip: release io resource when failing to init clk

We should call iounmap to relase reg_base since it's not going
to be used any more if failing to init clk.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
(cherry picked from git.kernel.org mmind/linux-rockchip.git
v4.7-clk/next commit 86609a6613c64ee9272da1fd2f578d4beab2174e)

Conflicts:

	drivers/clk/rockchip/clk-rk3228.c
[zx: there is no rk3228 clock controller, and apply this patch for
clk-rk3366 manually.]

Change-Id: I2d73c90eb6f43150725c81417af37a6a562cd329
Signed-off-by: Xing Zheng <zhengxing@rock-chips.com>