net: encx24j600: Export missing SPI module alias information

The driver Kconfig symbol is tristate which means that it can be built as
a module but the module alias information is not added to the module info
so module autoload won't work since user-space won't have the information.
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/microchip/encx24j600.c

@@ -1098,6 +1098,7 @@ static const struct spi_device_id encx24j600_spi_id_table[] = {
 	{ .name = "encx24j600" },
 	{ /* sentinel */ }
 };
+MODULE_DEVICE_TABLE(spi, encx24j600_spi_id_table);
 
 static struct spi_driver encx24j600_spi_net_driver = {
 	.driver = {