[media] exynos4-is: Correct querycap ioctl handling at fimc-lite driver

Fill in properly bus_info and card fields and set device_caps.
The querycap ioctl handler is renamed for consistency with the
other ioctls.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>