Staging: vt6656: Clean up return from sending power state notifications

Clean up power.c so that unnecessary final return statements
are not used when sending power state notifications to
the access point.

Signed-off-by: Philip Worrall <philip.worrall@googlemail.com>
Reviewed-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>