kvm: nVMX: Restore exit qual for VM-entry failure due to MSR loading

This exit qualification was inadvertently dropped when the two
VM-entry failure blocks were coalesced.

Fixes: e79f245d ("X86/KVM: Properly update 'tsc_offset' to represent the running guest")
Signed-off-by: Jim Mattson <jmattson@google.com>
Reviewed-by: Krish Sadhukhan <krish.sadhukhan@oracle.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>