USB: usbip: convert to use DRIVER_ATTR_RW

We are trying to get rid of DRIVER_ATTR(), and the usbip driver
attribute can be trivially changed to use DRIVER_ATTR_RW().

Cc: Valentina Manea <valentina.manea.m@gmail.com>
Cc: <linux-usb@vger.kernel.org>
Acked-by: NShuah Khan <shuahkh@osg.samsung.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/usbip/stub_main.c

@@ -134,7 +134,7 @@ int del_match_busid(char *busid)
 	return ret;
 }
 
-static ssize_t show_match_busid(struct device_driver *drv, char *buf)
+static ssize_t match_busid_show(struct device_driver *drv, char *buf)
 {
 	int i;
 	char *out = buf;
@@ -149,7 +149,7 @@ static ssize_t show_match_busid(struct device_driver *drv, char *buf)
 	return out - buf;
 }
 
-static ssize_t store_match_busid(struct device_driver *dev, const char *buf,
+static ssize_t match_busid_store(struct device_driver *dev, const char *buf,
 				 size_t count)
 {
 	int len;
@@ -181,8 +181,7 @@ static ssize_t store_match_busid(struct device_driver *dev, const char *buf,
 
 	return -EINVAL;
 }
-static DRIVER_ATTR(match_busid, S_IRUSR | S_IWUSR, show_match_busid,
-		   store_match_busid);
+static DRIVER_ATTR_RW(match_busid);
 
 static ssize_t rebind_store(struct device_driver *dev, const char *buf,
 				 size_t count)