MFC r264318:
Fix wrong sizes used to access PD_Type and PD_State DDF metadata fields.

This caused incorrect behavior of arrays with big-endian DDF metadata.
Little-endian (like used by Adaptec controllers) should not be harmed.
Add workaround should be enough to manage compatibility.
MFC: r264585

Add a missing break in the TCP case.

Reviewed by:	bms