bhyve nvme: Fix Namespace Specific Set Features

Return an error if the feature specified in Set Features is Namespace
specific but the Namespace ID uses the Global Namespace tag.

Fixes UNH Test 1.2.7

Reviewed by: imp, allanjude
Tested by: jason@tubnor.net
MFC after: 1 month
Differential Revision: https://reviews.freebsd.org/D33566