spidev: avoid warning when used directly in device tree

Avoid warning

    [    2.991522] spidev spi2.2: buggy DT: spidev listed directly in DT

when using spidev in device tree. See

    raspberrypi/linux#1054

Signed-off-by: Stefan Christ <[email protected]>
Signed-off-by: Stefan Riedmueller <[email protected]>
Signed-off-by: Jan Remmet <[email protected]>
Signed-off-by: Yunus Bas <[email protected]>
Signed-off-by: Andrej Picej <[email protected]>
Reviewed-by: Yunus Bas <[email protected]>

Author: Stefan Christ

drivers/spi/spidev.c

@@ -705,6 +705,8 @@ static const struct of_device_id spidev_dt_ids[] = {
 	{ .compatible = "menlo,m53cpld" },
 	{ .compatible = "cisco,spi-petra" },
 	{ .compatible = "micron,spi-authenta" },
+	/* avoids warning "buggy DT: spidev listed directly in DT" */
+	{ .compatible = "spidev" },
 	{},
 };
 MODULE_DEVICE_TABLE(of, spidev_dt_ids);