Staging: rt2860: fix coding style issue in rt_pci_rbus.c

This is a patch to the rt_pci_rbus.c file that fixes up errors found by
the checkpatch.pl tool

Signed-off-by: Gorskin Ilya <revent82@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>