Staging: bcm: Fixed warning 'braces {} are not necessary for single statement blocks'.

This patch fixes warning: 'braces {} are not necessary for single
statement blocks' found by checkpatch.pl in driver bcm.

Signed-off-by: Tülin İzer <tulinizer@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>