wilc1000: Add id_table to spi_driver

This eliminates warning message:

	SPI driver WILC_SPI has no spi_device_id for microchip,wilc1000

and makes device-tree autoloading work.
Signed-off-by: David Mosberger-Tang <davidm@egauge.net>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20211202045001.2901903-1-davidm@egauge.net

drivers/net/wireless/microchip/wilc1000/spi.c

@@ -203,11 +203,18 @@ static const struct of_device_id wilc_of_match[] = {
 };
 MODULE_DEVICE_TABLE(of, wilc_of_match);
 
+static const struct spi_device_id wilc_spi_id[] = {
+	{ "wilc1000", 0 },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(spi, wilc_spi_id);
+
 static struct spi_driver wilc_spi_driver = {
 	.driver = {
 		.name = MODALIAS,
 		.of_match_table = wilc_of_match,
 	},
+	.id_table = wilc_spi_id,
 	.probe =  wilc_bus_probe,
 	.remove = wilc_bus_remove,
 };