nandbcb: fix the issue cannot support gf_14 NAND boot

bchtype in FCB should be associated to the gf_13/14 settings in BCH, fix
the issue and test on Micron 29F64G08CBABB, it can boot after the
change.

Signed-off-by: Han Xu <han.xu@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/arch/arm/mach-imx/cmd_nandbcb.c b/arch/arm/mach-imx/cmd_nandbcb.c
index b3e59b1..103c3d6 100644
--- a/arch/arm/mach-imx/cmd_nandbcb.c
+++ b/arch/arm/mach-imx/cmd_nandbcb.c
@@ -154,6 +154,7 @@
 	fcb->ecc_level = l.ecc0;
 	fcb->ecc_size = l.datan_size;
 	fcb->ecc_type = l.eccn;
+	fcb->bchtype = l.gf_len;
 
 	/* Also hardcoded in kobs-ng */
 	if (is_mx6()) {