[media] staging: as102: Remove conditional compilation based on kernel version

Remove #if's related to kernel version and the code not applicable
to 3.2+ kernels.

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