mtd: dataflash: Add device-tree SPI IDs

Commit 5fa6863b ("spi: Check we have a spi_device_id for each DT
compatible") added a test to check that every SPI driver has a
spi_device_id for each DT compatiable string defined by the driver
and warns if the spi_device_id is missing. The spi_device_ids are
missing for the dataflash driver and the following warnings are now
seen.

 WARNING KERN SPI driver mtd_dataflash has no spi_device_id for atmel,at45
 WARNING KERN SPI driver mtd_dataflash has no spi_device_id for atmel,dataflash

Fix this by adding the necessary spi_device_ids.

Fixes: 96c8395e ("spi: Revert modalias changes")
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20211130112443.107730-1-jonathanh@nvidia.com

drivers/mtd/devices/mtd_dataflash.c

@@ -96,6 +96,13 @@ struct dataflash {
 	struct mtd_info		mtd;
 };
 
+static const struct spi_device_id dataflash_dev_ids[] = {
+	{ "at45" },
+	{ "dataflash" },
+	{ },
+};
+MODULE_DEVICE_TABLE(spi, dataflash_dev_ids);
+
 #ifdef CONFIG_OF
 static const struct of_device_id dataflash_dt_ids[] = {
 	{ .compatible = "atmel,at45", },
@@ -927,6 +934,7 @@ static struct spi_driver dataflash_driver = {
 		.name		= "mtd_dataflash",
 		.of_match_table = of_match_ptr(dataflash_dt_ids),
 	},
+	.id_table = dataflash_dev_ids,
 
 	.probe		= dataflash_probe,
 	.remove		= dataflash_remove,