spi: bcm63xx-hsspi: Export OF device ID table as module aliases

The device table is required to load modules based on
modaliases. After adding MODULE_DEVICE_TABLE, below entries
for example will be added to module.alias:
alias:          of:N*T*Cbrcm,bcm6328-hsspiC*
alias:          of:N*T*Cbrcm,bcm6328-hsspi

Signed-off-by: Andres Galacho <andresgalacho@gmail.com>
Acked-by: Jonas Gorski <jonas.gorski@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-bcm63xx-hsspi.c

@@ -484,6 +484,7 @@ static const struct of_device_id bcm63xx_hsspi_of_match[] = {
 	{ .compatible = "brcm,bcm6328-hsspi", },
 	{ },
 };
+MODULE_DEVICE_TABLE(of, bcm63xx_hsspi_of_match);
 
 static struct platform_driver bcm63xx_hsspi_driver = {
 	.driver = {