regulator: bd9576: Constify struct linear_range

'struct linear_range' are not modified in these drivers.

Constifying this structure moves some data to a read-only section, so
increase overall security.

This is also more consistent with the other struct linear_range declaration
above.

On a x86_64, with allmodconfig, as an example:
Before:
======
   text	   data	    bss	    dec	    hex	filename
  20767	   4544	      0	  25311	   62df	drivers/regulator/bd9576-regulator.o

After:
=====
   text	   data	    bss	    dec	    hex	filename
  21023	   4288	      0	  25311	   62df	drivers/regulator/bd9576-regulator.o
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://patch.msgid.link/a4e37991ea7b47145ab033128c8dd49f73a983e6.1722949232.git.christophe.jaillet@wanadoo.frSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/bd9576-regulator.c

@@ -68,25 +68,25 @@ static const struct linear_range voutL1_xvd_ranges[] = {
 	REGULATOR_LINEAR_RANGE(220000, 0x6e, 0x7f, 0),
 };
 
-static struct linear_range voutS1_ocw_ranges_internal[] = {
+static const struct linear_range voutS1_ocw_ranges_internal[] = {
 	REGULATOR_LINEAR_RANGE(200000, 0x01, 0x04, 0),
 	REGULATOR_LINEAR_RANGE(250000, 0x05, 0x18, 50000),
 	REGULATOR_LINEAR_RANGE(1200000, 0x19, 0x3f, 0),
 };
 
-static struct linear_range voutS1_ocw_ranges[] = {
+static const struct linear_range voutS1_ocw_ranges[] = {
 	REGULATOR_LINEAR_RANGE(50000, 0x01, 0x04, 0),
 	REGULATOR_LINEAR_RANGE(60000, 0x05, 0x18, 10000),
 	REGULATOR_LINEAR_RANGE(250000, 0x19, 0x3f, 0),
 };
 
-static struct linear_range voutS1_ocp_ranges_internal[] = {
+static const struct linear_range voutS1_ocp_ranges_internal[] = {
 	REGULATOR_LINEAR_RANGE(300000, 0x01, 0x06, 0),
 	REGULATOR_LINEAR_RANGE(350000, 0x7, 0x1b, 50000),
 	REGULATOR_LINEAR_RANGE(1350000, 0x1c, 0x3f, 0),
 };
 
-static struct linear_range voutS1_ocp_ranges[] = {
+static const struct linear_range voutS1_ocp_ranges[] = {
 	REGULATOR_LINEAR_RANGE(70000, 0x01, 0x06, 0),
 	REGULATOR_LINEAR_RANGE(80000, 0x7, 0x1b, 10000),
 	REGULATOR_LINEAR_RANGE(280000, 0x1c, 0x3f, 0),