clk: rockchip: fix parent clock for rk3188 hclk_lcdc1

The parent clock for hclk_lcdc1 was set to aclk_cpu instead of hclk_cpu.

Signed-off-by: Julien CHAUVEAU <julien.chauveau@neo-technologies.fr>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>