spi: mt65xx: Fix module alias

Remove extra space and make the alias matches driver name.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-mt65xx.c

@@ -746,4 +746,4 @@ module_platform_driver(mtk_spi_driver);
 MODULE_DESCRIPTION("MTK SPI Controller driver");
 MODULE_AUTHOR("Leilk Liu <leilk.liu@mediatek.com>");
 MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("platform: mtk_spi");
+MODULE_ALIAS("platform:mtk-spi");