mtd: gpmi: update the bitflip_threshold

The origin code misses to update the bitflip_threshold when
we have already get the right ecc_strength.

The patch fixes it.

Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

drivers/mtd/nand/gpmi-nand/gpmi-nand.c

@@ -1442,6 +1442,7 @@ static int gpmi_pre_bbt_scan(struct gpmi_nand_data  *this)
 	/* Adjust the ECC strength according to the chip. */
 	this->nand.ecc.strength = this->bch_geometry.ecc_strength;
 	this->mtd.ecc_strength = this->bch_geometry.ecc_strength;
+	this->mtd.bitflip_threshold = this->bch_geometry.ecc_strength;
 
 	/* NAND boot init, depends on the gpmi_set_geometry(). */
 	return nand_boot_init(this);