[PATCH fix] mtd: nand: add support for Samsung K9LCG08U0B

[Huang Shijie]

Assume that:
          tmp = ((extid >> 2) & 0x04) | (extid & 0x03));

>From the K9LCG08U0B's datasheet, we know that:
  the oob size is 640 when tmp is 6;
  the oob size is 1024 when tmp is 7;

Signed-off-by: Huang Shijie <b32955 at freescale.com>
---

[1] use the 1024, not the SZ_1k
[2] add back the default case for case 0.

---
 drivers/mtd/nand/nand_base.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index d388c7f..537afe0 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -3285,9 +3285,12 @@ static void nand_decode_ext_id(struct mtd_info *mtd, struct nand_chip *chip,
 			mtd->oobsize = 512;
 			break;
 		case 6:
-		default: /* Other cases are "reserved" (unknown) */
 			mtd->oobsize = 640;
 			break;
+		default: /* Other cases are "reserved" (unknown) */
+		case 7:
+			mtd->oobsize = 1024;
+			break;
 		}
 		extid >>= 2;
 		/* Calc blocksize */
-- 
1.7.2.rc3