[MTD] [OneNAND] proper onenand_bbt_read_oob() prototype

This patch adds a proper prototype for onenand_bbt_read_oob() in
include/linux/mtd/onenand.h

Signed-off-by: Adrian Bunk <[e-mail]>
Signed-off-by: David Woodhouse <[e-mail]>

drivers/mtd/onenand/onenand_bbt.c

···
 #include <linux/mtd/onenand.h>
 #include <linux/mtd/compatmac.h>
 
-extern int onenand_bbt_read_oob(struct mtd_info *mtd, loff_t from,
-				struct mtd_oob_ops *ops);
-
 /**
  * check_short_pattern - [GENERIC] check if a pattern is in the buffer
  * @param buf		the buffer to search

include/linux/mtd/onenand.h

···
         char *name;
 };
 
+int onenand_bbt_read_oob(struct mtd_info *mtd, loff_t from,
+			 struct mtd_oob_ops *ops);
+
 #endif	/* __LINUX_MTD_ONENAND_H */