sdm660: Label 4.19 backlight node

Change-Id: Ied1fc8844852fbef3711e46bcc07d4ec100e7a12
diff --git a/legacy/vendor/sdm660/genfs_contexts b/legacy/vendor/sdm660/genfs_contexts
index 6430542..650fbb5 100644
--- a/legacy/vendor/sdm660/genfs_contexts
+++ b/legacy/vendor/sdm660/genfs_contexts
@@ -90,6 +90,7 @@
 genfscon sysfs /devices/platform/soc/800f000.qcom,spmi/spmi-0/spmi0-03/800f000.qcom,spmi:qcom,pm660l@3:qcom,leds@d000/leds/green u:object_r:sysfs_graphics:s0
 genfscon sysfs /devices/platform/soc/800f000.qcom,spmi/spmi-0/spmi0-03/800f000.qcom,spmi:qcom,pm660l@3:qcom,leds@d000/leds/blue u:object_r:sysfs_graphics:s0
 genfscon sysfs /devices/platform/soc/800f000.qcom,spmi/spmi-0/spmi0-03/800f000.qcom,spmi:qcom,pm660l@3:qcom,leds@d300/leds u:object_r:sysfs_leds:s0
+genfscon sysfs /devices/platform/soc/800f000.qcom,spmi/spmi-0/spmi0-03/800f000.qcom,spmi:qcom,pm660l@3:qcom,leds@d800/backlight u:object_r:sysfs_leds:s0
 
 #cpu-ddr devfreq nodes for K4.14
 genfscon sysfs /devices/platform/soc/soc:qcom,cpu-cpu-ddr-bw/devfreq u:object_r:sysfs_devfreq:s0