linux-phytec-ti

media: usb: gspca: add a missed check for goto_low_power

The fix checks if goto_low_power() fails, and if so, issues an error
message.

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>