rockchip: clk: pll: add common pll setting funcs

Common PLL setup function, compatible with different SOC.
Mainly for the subsequent new SOC use.

Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/drivers/clk/rockchip/Makefile b/drivers/clk/rockchip/Makefile
index f9134fd..8035b26 100644
--- a/drivers/clk/rockchip/Makefile
+++ b/drivers/clk/rockchip/Makefile
@@ -3,6 +3,7 @@
 # Copyright (c) 2017 Rockchip Electronics Co., Ltd
 #
 
+obj-y += clk_pll.o
 obj-$(CONFIG_ROCKCHIP_PX30) += clk_px30.o
 obj-$(CONFIG_ROCKCHIP_RK3036) += clk_rk3036.o
 obj-$(CONFIG_ROCKCHIP_RK3128) += clk_rk3128.o