spi: altera: fix module autoload

Add the MODULE_DEVICE_TABLE macro for the platform_device_id table to
allow proper creation of modalias strings and fix autoloading module for
this driver.

Signed-off-by: Xu Yilun <yilun.xu@intel.com>
Signed-off-by: Russ Weight <russell.h.weight@intel.com>
Link: https://lore.kernel.org/r/1592962286-25752-3-git-send-email-yilun.xu@intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-altera.c

@@ -356,6 +356,7 @@ static const struct platform_device_id altera_spi_ids[] = {
 	{ "subdev_spi_altera",	ALTERA_SPI_TYPE_SUBDEV },
 	{ }
 };
+MODULE_DEVICE_TABLE(platform, altera_spi_ids);
 
 static struct platform_driver altera_spi_driver = {
 	.probe = altera_spi_probe,