USB-CDC: Replace 'strcpy' by 'strlcpy'

Replace 'strcpy' by more safe 'strlcpy' that is implemented in ether.c

Signed-off-by: Vitaly Kuzmichev <vkuzmichev@mvista.com>
diff --git a/drivers/usb/gadget/ether.c b/drivers/usb/gadget/ether.c
index 51f5006..283049e 100644
--- a/drivers/usb/gadget/ether.c
+++ b/drivers/usb/gadget/ether.c
@@ -1588,12 +1588,12 @@
 	if (bcdDevice)
 		device_desc.bcdDevice = cpu_to_le16(bcdDevice);
 	if (iManufacturer)
-		strcpy (manufacturer, iManufacturer);
+		strlcpy (manufacturer, iManufacturer, sizeof manufacturer);
 	if (iProduct)
-		strcpy (product_desc, iProduct);
+		strlcpy (product_desc, iProduct, sizeof product_desc);
 	if (iSerialNumber) {
 		device_desc.iSerialNumber = STRING_SERIALNUMBER,
-		strcpy(serial_number, iSerialNumber);
+		strlcpy(serial_number, iSerialNumber, sizeof serial_number);
 	}
 
 	/* all we really need is bulk IN/OUT */