spi: jcore: Fix module autoload for OF registration

If the driver is built as a module, autoload won't work because the module
alias information is not filled. So user-space can't match the registered
device with the corresponding module.

Export the module alias information using the MODULE_DEVICE_TABLE() macro.

Before this patch:

$ modinfo drivers/spi/spi-jcore.ko | grep alias
alias:          platform:jcore_spi

After this patch:

$ modinfo drivers/spi/spi-jcore.ko | grep alias
alias:          platform:jcore_spi
alias:          of:N*T*Cjcore,spi2C*
alias:          of:N*T*Cjcore,spi2

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-jcore.c

@@ -214,6 +214,7 @@ static const struct of_device_id jcore_spi_of_match[] = {
 	{ .compatible = "jcore,spi2" },
 	{},
 };
+MODULE_DEVICE_TABLE(of, jcore_spi_of_match);
 
 static struct platform_driver jcore_spi_driver = {
 	.probe = jcore_spi_probe,