[media] staging: as102: Replace printk(KERN_<LEVEL> witk pr_<level>

While at it also correct some spelling errors.

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