Staging: bcm2835-audio: Fixed that open brace should be on previous line error in bcm2835-ctl.c

Fixed ERROR: that open brace { should be on the previous line.
One coding style correction for better readable code.

Signed-off-by: Victor Vaschenko <vicmos89@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>