UPSTREAM: clk: rockchip: rk3036: enable the CLK_IGNORE_UNUSED flag for aclk_vio

UPSTREAM: clk: rockchip: rk3036: enable the CLK_IGNORE_UNUSED flag for aclk_vio

ACLK_VIO is the noc bus clock for display module, display cann't
read data from ddr without this clock enabled.

Due to it shouldn't belong to any driver, but we need it enabled,
so just mark it as the CLK_IGNORE_UNUSED flag.

Change-Id: Icd9742e3741bb460e530a4704f1719837c8292bd
Signed-off-by: Yakir Yang <ykk@rock-chips.com>
Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
(cherry picked from git.kernel.org next/linux-next.git master
 commit 2abc02fc494fa4c920a08a1d0beecabafbcb2104)