export debugfs /d/gpu.0/ch_wdt_timeout_ms to modify all channels' watchdog timeout this is needed for testing purpose only Bug 200133289 Change-Id: I8776b567d5d5a1c304334835b0bcab7b242cf0ab Signed-off-by: Deepak Nibade <dnibade@nvidia.com> Reviewed-on: http://git-master/r/810957 Reviewed-by: Automatic_Commit_Validation_User GVS: Gerrit_Virtual_Submit Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>