Revert "KVM: nested VMX: disable perf cpuid reporting"

Revert "KVM: nested VMX: disable perf cpuid reporting"

This reverts commit 972f898c598fbe903bd1265a748e3c31d3c44362.

A CPUID instruction executed in VMX non-root mode always causes a
VM-exit, regardless of the leaf being queried.

Fixes: 972f898c598f ("KVM: nested VMX: disable perf cpuid reporting")
Signed-off-by: Jim Mattson <jmattson@google.com>
[The issue solved by 972f898c598f has been resolved with 5013262e3e0f
 ("KVM: nVMX: Add nested msr load/restore algorithm").]
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>