tools/intel_vbt_decode: Resort block 2 decoding

Dump out block 2 contents in the same (big endianish)
order as it's listed in the spec. Also group each bitfield
into its own little block. Makes it a bit easier to cross
check between the two.

Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>