clk: meson: s4: pll: Constify struct regmap_config

`clkc_regmap_config` is not modified and can be declared as const to
 move its data to a read-only section.

Signed-off-by: Javier Carrasco <[email protected]>
Reviewed-by: Neil Armstrong <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jerome Brunet <[email protected]>

Author: javiercarrascocruz

drivers/clk/meson/s4-pll.c

@@ -799,7 +799,7 @@ static const struct reg_sequence s4_init_regs[] = {
 	{ .reg = ANACTRL_MPLL_CTRL0,	.def = 0x00000543 },
 };
 
-static struct regmap_config clkc_regmap_config = {
+static const struct regmap_config clkc_regmap_config = {
 	.reg_bits       = 32,
 	.val_bits       = 32,
 	.reg_stride     = 4,