mtd: nand: rename NAND_USE_FLASH_BBT

Recall the recently added prefix requirements:
 * "NAND_" for flags in nand.h, used in nand_chip.options
 * "NAND_BBT_" for flags in bbm.h, used in nand_chip.bbt_options
        or in nand_bbt_descr.options

Thus, I am changing NAND_USE_FLASH_BBT to NAND_BBT_USE_FLASH.

Again, this flag is found in bbm.h and so should NOT be used in the
"nand_chip.options" field.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
diff --git a/drivers/mtd/nand/cafe_nand.c b/drivers/mtd/nand/cafe_nand.c
index 7dd7d84..d0eed49 100644
--- a/drivers/mtd/nand/cafe_nand.c
+++ b/drivers/mtd/nand/cafe_nand.c
@@ -686,7 +686,7 @@
 	cafe->nand.chip_delay = 0;
 
 	/* Enable the following for a flash based bad block table */
-	cafe->nand.bbt_options = NAND_USE_FLASH_BBT;
+	cafe->nand.bbt_options = NAND_BBT_USE_FLASH;
 	cafe->nand.options = NAND_NO_AUTOINCR | NAND_OWN_BUFFERS;
 
 	if (skipbbt) {