clk: make several parent names const

Since commit 2893c379461a ("clk: make strings in parent name arrays
const") the name of parent clocks can be const. So add more const in
several clock drivers.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
diff --git a/drivers/clk/rockchip/clk-cpu.c b/drivers/clk/rockchip/clk-cpu.c
index 8539c4f..fb7721b 100644
--- a/drivers/clk/rockchip/clk-cpu.c
+++ b/drivers/clk/rockchip/clk-cpu.c
@@ -231,7 +231,7 @@
 }
 
 struct clk *rockchip_clk_register_cpuclk(const char *name,
-			const char **parent_names, u8 num_parents,
+			const char *const *parent_names, u8 num_parents,
 			const struct rockchip_cpuclk_reg_data *reg_data,
 			const struct rockchip_cpuclk_rate_table *rates,
 			int nrates, void __iomem *reg_base, spinlock_t *lock)