regulator: mt6358: Constify pointers to 'regulator_desc' wrap struct

Pointer to 'struct regulator_desc' is a pointer to const and the
wrapping structure (container) is not being modified, thus entire syntax
can be replaced to preferred and safer container_of_const().

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Link: https://patch.msgid.link/20251126-container-of-const-regulator-v1-6-eeec378144d4@oss.qualcomm.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: krzk

drivers/regulator/mt6358-regulator.c

@@ -31,7 +31,7 @@ struct mt6358_regulator_info {
 	u32 modeset_mask;
 };
 
-#define to_regulator_info(x) container_of((x), struct mt6358_regulator_info, desc)
+#define to_regulator_info(x) container_of_const((x), struct mt6358_regulator_info, desc)
 
 #define MT6358_BUCK(match, vreg, supply, min, max, step,	\
 		    vosel_mask, _da_vsel_reg, _da_vsel_mask,	\