mtd: rawnand: sunxi: drop unused module alias

The driver has never supported anything but OF probing so drop the
unused platform module alias.

Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

Author: jhovold

drivers/mtd/nand/raw/sunxi_nand.c

@@ -2205,4 +2205,3 @@ module_platform_driver(sunxi_nfc_driver);
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Boris BREZILLON");
 MODULE_DESCRIPTION("Allwinner NAND Flash Controller driver");
-MODULE_ALIAS("platform:sunxi_nand");