[media] go7007: fix DMA related errors

- Don't pass data allocated on the stack to usb_control_msg.
- Use dma_mapping_error after calling dma_map_page().

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>