commit2a8e0fc8b3("nand: Merge changes from Linux nand driver") accidentally reverted commit13f0fd94e3("NAND: Scan bad blocks lazily."). Reinstate the change, as amended by commitff49ea8977("NAND: Mark the BBT as scanned prior to calling scan_bbt."). Signed-off-by: Scott Wood <scottwood@freescale.com>