V4L/DVB (8554): media/video/Kconfig: cosmetic changes and convert select into depends on

It seems cosmetically better to let USB drivers be the last one.

Also, two SOC drivers were using select, instead of depends on SOC_CAMERA.

Since select has some drawbacks when checking for dependencies, convert those
two into depends on.

Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>