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/board/ronetix/pm9263/pm9263.c b/board/ronetix/pm9263/pm9263.c
index 276ff80..e9f9b67 100644
--- a/board/ronetix/pm9263/pm9263.c
+++ b/board/ronetix/pm9263/pm9263.c
@@ -293,7 +293,7 @@
 
 	nand_size = 0;
 	for (i = 0; i < CONFIG_SYS_MAX_NAND_DEVICE; i++)
-		nand_size += nand_info[i].size;
+		nand_size += nand_info[i]->size;
 
 	flash_size = 0;
 	for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++)