[MTD] OneNAND: Free the bad block table when the device is released

OneNAND does 2 memory allocations for bad block information.
Only one of them was being freed.

Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c
index 0ade237..0249b4a 100644
--- a/drivers/mtd/onenand/onenand_base.c
+++ b/drivers/mtd/onenand/onenand_base.c
@@ -2133,8 +2133,11 @@
 	del_mtd_device (mtd);
 
 	/* Free bad block table memory, if allocated */
-	if (this->bbm)
+	if (this->bbm) {
+		struct bbm_info *bbm = this->bbm;
+		kfree(bbm->bbt);
 		kfree(this->bbm);
+	}
 	/* Buffer allocated by onenand_scan */
 	if (this->options & ONENAND_PAGEBUF_ALLOC)
 		kfree(this->page_buf);