mtd: nand: introduce NAND_CREATE_EMPTY_BBT

it will create an empty BBT table without considering vendor's BBT
information. Vendor's information may be unavailable if the NAND
controller has a different DATA & OOB layout or this information may be
allready purged.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
diff --git a/include/linux/mtd/bbm.h b/include/linux/mtd/bbm.h
index ba15b525..57cc0e6 100644
--- a/include/linux/mtd/bbm.h
+++ b/include/linux/mtd/bbm.h
@@ -84,7 +84,7 @@
 #define NAND_BBT_PERCHIP	0x00000080
 /* bbt has a version counter at offset veroffs */
 #define NAND_BBT_VERSION	0x00000100
-/* Create a bbt if none axists */
+/* Create a bbt if none exists */
 #define NAND_BBT_CREATE		0x00000200
 /* Search good / bad pattern through all pages of a block */
 #define NAND_BBT_SCANALLPAGES	0x00000400