V4L/DVB (11413): gspca - m5602-mt9m111: Separate mode vectors per sensor.

By separating the supported for each sensor into a separate vector we can
eliminate the nmodes variable and instead calculate it at runtime.

Signed-off-by: Erik Andr?n <erik.andren@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>