Write bootstream to kernel by kobs with BCH ECC.
Using the same combined Metadata & Block 0 BCH layout
with ROM code.
Page size 2048B; spare area 64B => ECC8, N=3, B0=512B, M=10B
Page size 4096B; spare area 128B => ECC8, N=7, B0=512B, M=10B
Page size 4096B; spare area 218B => ECC16, N=7, B0=512B, M=10B
Signed-off-by:Jason Liu <r64343@freescale.com>