staging: bcm: fixed space related errors around operators

removed any prohibited spaces and added required spaces
around operators to follow linux coding style and hence
fixed the checkpatch errors

Signed-off-by: Nandini Hanumanthagowda <nandu.hgowda@gmail.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>