leds: sgm3140: Move driver to flash subdirectory

We created a subdirectory for LED drivers that depend on
CONFIG_LEDS_CLASS_FLASH, and this driver does so let's
move it there.

Cc: Luca Weiss <luca@z3ntu.xyz>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Pavel Machek <pavel@ucw.cz>
diff --git a/drivers/leds/flash/Kconfig b/drivers/leds/flash/Kconfig
index 6401af2..788d698 100644
--- a/drivers/leds/flash/Kconfig
+++ b/drivers/leds/flash/Kconfig
@@ -52,4 +52,11 @@
 	  To compile this driver as a module, choose M here: the module
 	  will be called leds-rt8515.
 
+config LEDS_SGM3140
+	tristate "LED support for the SGM3140"
+	depends on V4L2_FLASH_LED_CLASS || !V4L2_FLASH_LED_CLASS
+	help
+	  This option enables support for the SGM3140 500mA Buck/Boost Charge
+	  Pump LED Driver.
+
 endif # LEDS_CLASS_FLASH