[media] solo6x10: fix broken PAL support

The video_type was never set correctly for PAL: it's not a bool, instead
it is a register value.

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