[media] media: bcm2048: fix several macros

Some of the macros didn't use the parenthesis around the parameters when
used in the body of the macro.

Signed-off-by: Nikola Jelic <nikola.jelic83@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>