liblight: Kanged mostly from hardware/qcom/sdm845/display/liblight

Removed the LED control paths we dont yet support upstream and
updated backlight wled brightness sysfs path from downstream
"/sys/class/backlight/panel0-backlight/brightness" to upstream
"/sys/class/backlight/wled/brightness".

Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
diff --git a/sepolicy/genfs_contexts b/sepolicy/genfs_contexts
index f3799ed..90ca07a 100644
--- a/sepolicy/genfs_contexts
+++ b/sepolicy/genfs_contexts
@@ -4,3 +4,4 @@
 genfscon sysfs   /devices/platform/soc@0/4080000.remoteproc					u:object_r:sysfs_remoteproc:s0
 genfscon sysfs   /devices/platform/soc@0/ae00000.mdss						u:object_r:sysfs_gpu:s0
 genfscon sysfs   /devices/platform/soc@0/c440000.spmi/spmi-0/0-00/c440000.spmi:pmic@0:rtc@6000	u:object_r:sysfs_rtc:s0
+genfscon sysfs   /devices/platform/soc@0/c440000.spmi/spmi-0/0-03/c440000.spmi:pmic@3:wled@d800/backlight/wled/ u:object_r:sysfs_lights:s0