staging: serqt_usb2: fix dbg print when kzalloc failed to allocate qt_port

the port was kzalloced but the print statement says that its kmalloc.
Signed-off-by: NDevendra Naga <devendra.aaru@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/serqt_usb2/serqt_usb2.c

@@ -704,7 +704,7 @@ static int qt_startup(struct usb_serial *serial)
 		port = serial->port[i];
 		qt_port = kzalloc(sizeof(*qt_port), GFP_KERNEL);
 		if (!qt_port) {
-			dbg("%s: kmalloc for quatech_port (%d) failed!.",
+			dbg("%s: kzalloc for quatech_port (%d) failed!.",
 			    __func__, i);
 			for (--i; i >= 0; i--) {
 				port = serial->port[i];