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

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

This reverts commit 7476e52f94c13c327569e327c6ae5d34151f2c2d.

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

Fixes: 7476e52f94c1 ("KVM: nested VMX: disable perf cpuid reporting")
Signed-off-by: Jim Mattson <jmattson@google.com>
[The issue solved by 7476e52f94c1 has been resolved with dfa53594b158
 ("KVM: nVMX: Add nested msr load/restore algorithm").]
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>