Revert "KVM: nVMX: reset cache/shadows when switching loaded VMCS"

Revert "KVM: nVMX: reset cache/shadows when switching loaded VMCS"

This reverts commit 9f0b41be6aff47c24c6431bdc76f86b9cd647a0d which is
commit b7031fd40fcc741b0f9b0c04c8d844e445858b84 upstream.

It should not have been selected for a stable kernel as it breaks the
nVMX regression tests.

Reported-by: Jack Wang <jack.wang.usish@gmail.com>
Reported-by: Paolo Bonzini <pbonzini@redhat.com>
Cc: Jim Mattson <jmattson@google.com>
Cc: Sean Christopherson <sean.j.christopherson@intel.com>
Cc: Jim Mattson <jmattson@google.com>
Cc: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>