usb: host: xhci-plat: fix of_table.cocci warnings

Make sure (of/i2c/platform)_device_id tables are NULL terminated

Generated by: scripts/coccinelle/misc/of_table.cocci
Signed-off-by: NFengguang Wu <fengguang.wu@intel.com>
Signed-off-by: NJulia Lawall <julia.lawall@lip6.fr>
Signed-off-by: NMathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/host/xhci-plat.c

@@ -116,6 +116,7 @@ static const struct of_device_id usb_xhci_of_match[] = {
 		.compatible = "renesas,rcar-gen3-xhci",
 		.data = &xhci_plat_renesas_rcar_gen3,
 	},
+	{},
 };
 MODULE_DEVICE_TABLE(of, usb_xhci_of_match);
 #endif