powerpc/T102xRDB: Enable ifc nand ecc encode and decode

IFC nand ecc encode and decode mode are not correctly
set in CSOR register during nand initialization.Enable
ecc encode/decode in 4-bit mode

Signed-off-by: Jaiprakash Singh <b44839@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>