bhyve: fix NVMe queue creation and deletion

Add checks for various types of invalid I/O Queue Create and Delete
command parameters, including:

• QID=0
• QID>MAX
• QID already in use
• Delete an Active CQ
• Invalid QSIZE
• Invalid CQID (SQ creation)
• Invalid interrupt vector (CQ creation)

Fixes UNH Tests 1.4.2-5,7-8

Tested by: Jason Tubnor
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D24886