kvm-unit-tests: VMX: Fix two minor bugs in EPT framework

This patch just contains two minor changes to EPT framwork.
1. Reorder macro definition
2. Fix bug of setting CPU_EPT without check.

Signed-off-by: Arthur Chunqi Li <yzt356@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>