leds: lp8860: Constify reg_default tables

These reg_default tables are not modified after initialized, so make them
const.

Signed-off-by: Axel Lin <[e-mail]>
Signed-off-by: Jacek Anaszewski <[e-mail]>

drivers/leds/leds-lp8860.c

···
 	return ret;
 }
 
-static struct reg_default lp8860_reg_defs[] = {
+static const struct reg_default lp8860_reg_defs[] = {
 	{ LP8860_DISP_CL1_BRT_MSB, 0x00},
 	{ LP8860_DISP_CL1_BRT_LSB, 0x00},
 	{ LP8860_DISP_CL1_CURR_MSB, 0x00},
···
 	.cache_type = REGCACHE_NONE,
 };
 
-static struct reg_default lp8860_eeprom_defs[] = {
+static const struct reg_default lp8860_eeprom_defs[] = {
 	{ LP8860_EEPROM_REG_0, 0x00 },
 	{ LP8860_EEPROM_REG_1, 0x00 },
 	{ LP8860_EEPROM_REG_2, 0x00 },