[media] V4L2: mt9t112: fixup JPEG initialization workaround

It has been indicated on Atmark Techno Web page
http://armadillo.atmark-techno.com/faq/a800eva-dont-work-camera



Signed-off-by: Masahiro Nakai <nakai@atmark-techno.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>