arm64:tegra:dts: Disable backlight in charging loop

arm64:tegra:dts: Disable backlight in charging loop

Bug 200069217

Change-Id: I6aad66f763e353ae82b8d4826325d5a9388b000a
Signed-off-by: Ankita Garg <ankitag@nvidia.com>
Reviewed-on: http://git-master/r/669461
(cherry picked from commit 6a8c8fb44212ea39bc781db73c5c9595e582b0a4)
Reviewed-on: http://git-master/r/676621
Reviewed-on: http://git-master/r/681733
Reviewed-by: Spencer Sutterlin <ssutterlin@nvidia.com>
Tested-by: Spencer Sutterlin <ssutterlin@nvidia.com>
Reviewed-by: Mitch Luban <mluban@nvidia.com>