spi: ti-qspi: Fixup driver name

The driver name in current code looks like a compatible string which is not
the naming convention for platform drivers.
Fix it and also add modalias since this driver can be built as a module.

Signed-off-by: Axel Lin <[e-mail]>
Acked-by: Sourav Poddar <[e-mail]>
Signed-off-by: Mark Brown <[e-mail]>

drivers/spi/spi-ti-qspi.c

···
 	.probe	= ti_qspi_probe,
 	.remove = ti_qspi_remove,
 	.driver = {
-		.name	= "ti,dra7xxx-qspi",
+		.name	= "ti-qspi",
 		.owner	= THIS_MODULE,
 		.pm =   &ti_qspi_pm_ops,
 		.of_match_table = ti_qspi_match,
···
 MODULE_AUTHOR("Sourav Poddar <[e-mail]>");
 MODULE_LICENSE("GPL v2");
 MODULE_DESCRIPTION("TI QSPI controller driver");
+MODULE_ALIAS("platform:ti-qspi");