regulator: bd9576: Constify the voltage tables

Also use unsigned int instead of int for the voltage tables.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Link: https://lore.kernel.org/r/20210525100405.2506483-1-axel.lin@ingics.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/bd9576-regulator.c

@@ -21,20 +21,26 @@
 #define BD957X_VOUTS4_BASE_VOLT	1030000
 #define BD957X_VOUTS34_NUM_VOLT	32
 
-static int vout1_volt_table[] = {5000000, 4900000, 4800000, 4700000, 4600000,
-				 4500000, 4500000, 4500000, 5000000, 5100000,
-				 5200000, 5300000, 5400000, 5500000, 5500000,
-				 5500000};
-
-static int vout2_volt_table[] = {1800000, 1780000, 1760000, 1740000, 1720000,
-				 1700000, 1680000, 1660000, 1800000, 1820000,
-				 1840000, 1860000, 1880000, 1900000, 1920000,
-				 1940000};
-
-static int voutl1_volt_table[] = {2500000, 2540000, 2580000, 2620000, 2660000,
-				  2700000, 2740000, 2780000, 2500000, 2460000,
-				  2420000, 2380000, 2340000, 2300000, 2260000,
-				  2220000};
+static const unsigned int vout1_volt_table[] = {
+	5000000, 4900000, 4800000, 4700000, 4600000,
+	4500000, 4500000, 4500000, 5000000, 5100000,
+	5200000, 5300000, 5400000, 5500000, 5500000,
+	5500000
+};
+
+static const unsigned int vout2_volt_table[] = {
+	1800000, 1780000, 1760000, 1740000, 1720000,
+	1700000, 1680000, 1660000, 1800000, 1820000,
+	1840000, 1860000, 1880000, 1900000, 1920000,
+	1940000
+};
+
+static const unsigned int voutl1_volt_table[] = {
+	2500000, 2540000, 2580000, 2620000, 2660000,
+	2700000, 2740000, 2780000, 2500000, 2460000,
+	2420000, 2380000, 2340000, 2300000, 2260000,
+	2220000
+};
 
 struct bd957x_regulator_data {
 	struct regulator_desc desc;