hammerhead: Turn off led if msON is 0

Bug: 10127266
Change-Id: I2921824450c4182b1213a857a98c26d6f30939d3
diff --git a/liblight/lights.c b/liblight/lights.c
index 2bb0014..d8f2961 100644
--- a/liblight/lights.c
+++ b/liblight/lights.c
@@ -150,6 +150,13 @@
     green = (colorRGB >> 8) & 0xFF;
     blue = colorRGB & 0xFF;
 
+    // due to limitation of driver
+    if (onMS == 0) {
+        red = 0;
+        green = 0;
+        blue = 0;
+    }
+
     write_int(RGB_LOCKED_FILE, 0);
 
     write_int(RED_LED_FILE, red);