spi: spidev: Completely disable the spidev warning

An alternative strategy would be to use "rpi,spidev" instead, but that
would require many Raspberry Pi Device Tree changes.

Signed-off-by: Phil Elwell <phil@raspberrypi.org>

drivers/spi/spidev.c

@@ -726,7 +726,7 @@ MODULE_DEVICE_TABLE(spi, spidev_spi_ids);
  */
 static int spidev_of_check(struct device *dev)
 {
-	if (device_property_match_string(dev, "compatible", "spidev") < 0)
+	if (1 || device_property_match_string(dev, "compatible", "spidev") < 0)
 		return 0;
 
 	dev_err(dev, "spidev listed directly in DT is not supported\n");