nand: Embed mtd_info in struct nand_chip

nand_info[] is now an array of pointers, with the actual mtd_info
instance embedded in struct nand_chip.

This is in preparation for syncing the NAND code with Linux 4.6,
which makes the same change to struct nand_chip.  It's in a separate
commit due to the large amount of changes required to accommodate the
change to nand_info[].

Signed-off-by: Scott Wood <oss@buserror.net>
diff --git a/fs/jffs2/jffs2_nand_1pass.c b/fs/jffs2/jffs2_nand_1pass.c
index 9b7af09..d94c48f 100644
--- a/fs/jffs2/jffs2_nand_1pass.c
+++ b/fs/jffs2/jffs2_nand_1pass.c
@@ -796,7 +796,7 @@
 	u32 counterN = 0;
 
 	struct mtdids *id = part->dev->id;
-	mtd = nand_info + id->num;
+	mtd = nand_info[id->num];
 
 	/* if we are building a list we need to refresh the cache. */
 	jffs_init_1pass_list(part);