power: supply: bq256xx_charger: Constify reg_default array

Static 'struct reg_default' array is not modified so can be changed to
const for more safety.

Signed-off-by: Krzysztof Kozlowski <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Sebastian Reichel <[e-mail]>

drivers/power/supply/bq256xx_charger.c

···
 	}
 }
 
-static struct reg_default bq2560x_reg_defs[] = {
+static const struct reg_default bq2560x_reg_defs[] = {
 	{BQ256XX_INPUT_CURRENT_LIMIT, 0x17},
 	{BQ256XX_CHARGER_CONTROL_0, 0x1a},
 	{BQ256XX_CHARGE_CURRENT_LIMIT, 0xa2},
···
 	{BQ256XX_CHARGER_CONTROL_3, 0x4c},
 };
 
-static struct reg_default bq25611d_reg_defs[] = {
+static const struct reg_default bq25611d_reg_defs[] = {
 	{BQ256XX_INPUT_CURRENT_LIMIT, 0x17},
 	{BQ256XX_CHARGER_CONTROL_0, 0x1a},
 	{BQ256XX_CHARGE_CURRENT_LIMIT, 0x91},
···
 	{BQ256XX_CHARGER_CONTROL_4, 0x75},
 };
 
-static struct reg_default bq25618_619_reg_defs[] = {
+static const struct reg_default bq25618_619_reg_defs[] = {
 	{BQ256XX_INPUT_CURRENT_LIMIT, 0x17},
 	{BQ256XX_CHARGER_CONTROL_0, 0x1a},
 	{BQ256XX_CHARGE_CURRENT_LIMIT, 0x91},