nand: phytium_nand: use shared unaligned.h header

Change <asm/unaligned.h> => <linux/unaligned.h> per upstream changes.

Signed-off-by: Mingcong Bai <jeffbai@aosc.io>

drivers/mtd/nand/raw/phytium_nand.h

@@ -16,7 +16,7 @@
 #include <linux/slab.h>
 #include <linux/mfd/syscon.h>
 #include <linux/regmap.h>
-#include <asm/unaligned.h>
+#include <linux/unaligned.h>
 #include <linux/dma-mapping.h>
 #include <linux/workqueue.h>
 #include <linux/mtd/partitions.h>