leds: lp8860: Fix module dependency

The driver should select REGMAP_I2C rather than depend on it.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>

drivers/leds/Kconfig

@@ -252,7 +252,8 @@ config LEDS_LP8788
 
 config LEDS_LP8860
 	tristate "LED support for the TI LP8860 4 channel LED driver"
-	depends on LEDS_CLASS && REGMAP_I2C
+	depends on LEDS_CLASS && I2C
+	select REGMAP_I2C
 	help
 	  If you say yes here you get support for the TI LP8860 4 channel
 	  LED driver.