rapidio: rio-sysfs.c: convert to use BUS_ATTR_WO

We are trying to get rid of BUS_ATTR() and the usage of that in
rio-sysfs.c can be trivially converted to use BUS_ATTR_WO(), so use that
instead.

Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Alexandre Bounine <alex.bou9@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/rapidio/rio-sysfs.c

@@ -290,8 +290,7 @@ const struct attribute_group *rio_dev_groups[] = {
 	NULL,
 };
 
-static ssize_t bus_scan_store(struct bus_type *bus, const char *buf,
-				size_t count)
+static ssize_t scan_store(struct bus_type *bus, const char *buf, size_t count)
 {
 	long val;
 	int rc;
@@ -314,7 +313,7 @@ exit:
 
 	return rc;
 }
-static BUS_ATTR(scan, (S_IWUSR|S_IWGRP), NULL, bus_scan_store);
+static BUS_ATTR_WO(scan);
 
 static struct attribute *rio_bus_attrs[] = {
 	&bus_attr_scan.attr,