flounder: add lights HAL

Change-Id: Ic290b08c6ba3b64b6463a8d8844e875c3c6c3461
diff --git a/ueventd.flounder.rc b/ueventd.flounder.rc
index a362394..9d54837 100755
--- a/ueventd.flounder.rc
+++ b/ueventd.flounder.rc
@@ -5,3 +5,5 @@
 /dev/nvhdcp1    0666    system  system
 /dev/nvhost*    0666    root    root
 /dev/raydium_ts 0777    system  system
+
+/sys/devices/platform/pwm-backlight/backlight/pwm-backlight    brightness    0660   system   system