clk: sunxi-ng r40: Constify struct regmap_config

`sun8i_r40_ccu_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]>
Link: https://lore.kernel.org/r/[email protected]
Reviewed-by: Andre Przywara <[email protected]>
Acked-by: Chen-Yu Tsai <[email protected]>
Signed-off-by: Stephen Boyd <[email protected]>

Author: javiercarrascocruz

drivers/clk/sunxi-ng/ccu-sun8i-r40.c

@@ -1292,7 +1292,7 @@ static bool sun8i_r40_ccu_regmap_accessible_reg(struct device *dev,
 	return false;
 }
 
-static struct regmap_config sun8i_r40_ccu_regmap_config = {
+static const struct regmap_config sun8i_r40_ccu_regmap_config = {
 	.reg_bits	= 32,
 	.val_bits	= 32,
 	.reg_stride	= 4,