rockchip: clk: Add clk driver for rk3308

Add clk controller driver for RK3308 SOC.

This patch depends on Elaine's pll patch[0].

[0]http://patchwork.ozlabs.org/patch/1183718/

Signed-off-by: Andy Yan <andy.yan@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 8035b26..4cfcf83 100644
--- a/drivers/clk/rockchip/Makefile
+++ b/drivers/clk/rockchip/Makefile
@@ -10,6 +10,7 @@
 obj-$(CONFIG_ROCKCHIP_RK3188) += clk_rk3188.o
 obj-$(CONFIG_ROCKCHIP_RK322X) += clk_rk322x.o
 obj-$(CONFIG_ROCKCHIP_RK3288) += clk_rk3288.o
+obj-$(CONFIG_ROCKCHIP_RK3308) += clk_rk3308.o
 obj-$(CONFIG_ROCKCHIP_RK3328) += clk_rk3328.o
 obj-$(CONFIG_ROCKCHIP_RK3368) += clk_rk3368.o
 obj-$(CONFIG_ROCKCHIP_RK3399) += clk_rk3399.o