regulator: s2mps11: Constify regulator_desc array

Constify the regulator_desc 'regulators' array.
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: NMark Brown <broonie@linaro.org>

drivers/regulator/s2mps11.c

@@ -343,7 +343,7 @@ static struct regulator_ops s2mps11_buck_ops = {
 	.enable_mask	= S2MPS11_ENABLE_MASK			\
 }
 
-static struct regulator_desc regulators[] = {
+static const struct regulator_desc regulators[] = {
 	regulator_desc_ldo2(1),
 	regulator_desc_ldo1(2),
 	regulator_desc_ldo1(3),