[media] staging: as102: Make the driver select CONFIG_FW_LOADER

It doesn't seem to be of much advantage to compile in FW_LOADER
support conditionally, then make the driver always select FW_LOADER
and remove #idefs from the code.

Cc: Devin Heitmueller <dheitmueller@kernellabs.com>
Signed-off-by: Sylwester Nawrocki <snjw23@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>