Drop an explicit MMU reset in SVM's vCPU RESET/INIT flow now that the
common x86 path correctly handles conditional MMU resets, e.g. if INIT
arrives while the vCPU is in 64-bit mode.

This reverts commit ebae871a ("kvm: svm: reset mmu on VCPU reset").
Reviewed-by: NReiji Watanabe <reijiw@google.com>
Signed-off-by: NSean Christopherson <seanjc@google.com>
Message-Id: <20210713163324.627647-9-seanjc@google.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>