[Kconfig] Decompose Kconfig, now each module has its own Kconfig

Which is better for versioning and decomposability

src/drivers/lights/Kconfig

@@ -1,26 +1,3 @@
-menuconfig DRIVERS_LIGHTS_BLINKM
-	bool "Blinkm"
-	default n
-	---help---
-		Enable support for blinkm lights
-		
-menuconfig DRIVERS_LIGHTS_NEOPIXEL
-	bool "Neopixel"
-	default n
-	---help---
-		Enable support for Neopixel lights
-		
-menuconfig DRIVERS_LIGHTS_RGBLED
-	bool "RGB Led"
-	---help---
-		Enable support for RGB led
-		
-menuconfig DRIVERS_LIGHTS_RGBLED_PWM
-	bool "RGB Led PWM"
-	---help---
-		Enable support for RGB PWM led
-		
-menuconfig DRIVERS_LIGHTS_RGBLED_NCP5623C
-	bool "RGB Led NCP5623C"
-	---help---
-		Enable support for RGB NCP5623C led
+menu "Lights"
+rsource "*/Kconfig"
+endmenu

src/drivers/lights/blinkm/Kconfig

@@ -0,0 +1,5 @@
+menuconfig DRIVERS_LIGHTS_BLINKM
+	bool "blinkm"
+	default n
+	---help---
+		Enable support for blinkm

src/drivers/lights/neopixel/Kconfig

@@ -0,0 +1,5 @@
+menuconfig DRIVERS_LIGHTS_NEOPIXEL
+	bool "neopixel"
+	default n
+	---help---
+		Enable support for neopixel

src/drivers/lights/rgbled/Kconfig

@@ -0,0 +1,5 @@
+menuconfig DRIVERS_LIGHTS_RGBLED
+	bool "rgbled"
+	default n
+	---help---
+		Enable support for rgbled

src/drivers/lights/rgbled_ncp5623c/Kconfig

@@ -0,0 +1,5 @@
+menuconfig DRIVERS_LIGHTS_RGBLED_NCP5623C
+	bool "rgbled_ncp5623c"
+	default n
+	---help---
+		Enable support for rgbled_ncp5623c

src/drivers/lights/rgbled_pwm/Kconfig

@@ -0,0 +1,5 @@
+menuconfig DRIVERS_LIGHTS_RGBLED_PWM
+	bool "rgbled_pwm"
+	default n
+	---help---
+		Enable support for rgbled_pwm