leds: lp8860: Drop unneeded assignment for cache_type

REGCACHE_NONE is the default type of the cache when not provided.
Drop unneeded explicit assignment to it.

Note, it's defined to 0, and if ever be redefined, it will break
literally a lot of the drivers, so it very unlikely to happen.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20250129152659.1801420-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Lee Jones <lee@kernel.org>

Author: andy-shev

drivers/leds/leds-lp8860.c

@@ -331,7 +331,6 @@ static const struct regmap_config lp8860_regmap_config = {
 	.max_register = LP8860_EEPROM_UNLOCK,
 	.reg_defaults = lp8860_reg_defs,
 	.num_reg_defaults = ARRAY_SIZE(lp8860_reg_defs),
-	.cache_type = REGCACHE_NONE,
 };
 
 static const struct reg_default lp8860_eeprom_defs[] = {
@@ -369,7 +368,6 @@ static const struct regmap_config lp8860_eeprom_regmap_config = {
 	.max_register = LP8860_EEPROM_REG_24,
 	.reg_defaults = lp8860_eeprom_defs,
 	.num_reg_defaults = ARRAY_SIZE(lp8860_eeprom_defs),
-	.cache_type = REGCACHE_NONE,
 };
 
 static int lp8860_probe(struct i2c_client *client)