staging: line6: Use kmemdup rather than duplicating its implementation

staging: line6: driver.c
 The semantic patch that makes this output is available
 in scripts/coccinelle/api/memdup.cocci.
Signed-off-by: NLaurent Navet <laurent.navet@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/line6/driver.c

@@ -307,14 +307,13 @@ int line6_version_request_async(struct usb_line6 *line6)
 	char *buffer;
 	int retval;
 
-	buffer = kmalloc(sizeof(line6_request_version), GFP_ATOMIC);
+	buffer = kmemdup(line6_request_version,
+			sizeof(line6_request_version), GFP_ATOMIC);
 	if (buffer == NULL) {
 		dev_err(line6->ifcdev, "Out of memory");
 		return -ENOMEM;
 	}
 
-	memcpy(buffer, line6_request_version, sizeof(line6_request_version));
-
 	retval = line6_send_raw_message_async(line6, buffer,
 					      sizeof(line6_request_version));
 	kfree(buffer);