toolchain: fixed some mistakes in the FTFL_FLEXNVM_PARTITION enum, duplicated it in SIM

1) One of the values was 0x05 when it should be 0x09 according to docs
2) All the values need the four MSB set according to docs

It's duplicated in SIM because it's slightly different (4 bit value instead of 8 bit padded with 1111) and we don't want a dependency between the files anyway.