staging: bcm2835-audio: Fixed checkpatch warning due to line spacing

bcm2835-vchiq.c:
fixing ERROR: Checkpatch warnings due to extra blank lines or absence of blank
lines where needed.

Signed-off-by: Abhijit Naik <abhijitnaik27@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>