[PATCH -next] leds: fix LEDS_LP55XX_COMMON dependency and build errors

[Randy Dunlap]

From: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>

Make LEDS_LP55XX_COMMON depend on I2C to fix build errors:

leds-lp55xx-common.c:(.text+0x9d): undefined reference to `i2c_smbus_read_byte_data'
leds-lp55xx-common.c:(.text+0x8fc): undefined reference to `i2c_smbus_write_byte_data'

These errors happened when I2C=m and LEDS_LP55XX_COMMON=y, so
prevent that from being possible.

Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Cc: Jacek Anaszewski <jacek.anaszewski@xxxxxxxxx>
Cc: Pavel Machek <pavel@xxxxxx>
Cc: Dan Murphy <dmurphy@xxxxxx>
Cc: linux-leds@xxxxxxxxxxxxxxx
Cc: Milo Kim <milo.kim@xxxxxx>
Cc: Mathias Nyman <mathias.nyman@xxxxxxxxx>
---
 drivers/leds/Kconfig |    1 +
 1 file changed, 1 insertion(+)

--- linux-next-20200727.orig/drivers/leds/Kconfig
+++ linux-next-20200727/drivers/leds/Kconfig
@@ -399,6 +399,7 @@ config LEDS_LP55XX_COMMON
 	tristate "Common Driver for TI/National LP5521/5523/55231/5562/8501"
 	depends on LEDS_CLASS_MULTICOLOR || !LEDS_CLASS_MULTICOLOR
 	depends on OF
+	depends on I2C
 	select FW_LOADER
 	select FW_LOADER_USER_HELPER
 	help