[media] solo6x10: check dma_map_sg() return value

The dma_map_sg() function can fail, so check for the return value.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

diff --cc drivers/staging/media/solo6x10/solo6x10-v4l2-enc.c
Simple merge