Unconditionally invoke sev_hardware_setup() when configuring SVM and
handle clearing the module params/variable 'sev' and 'sev_es' in
sev_hardware_setup().  This allows making said variables static within
sev.c and reduces the odds of a collision with guest code, e.g. the guest
side of things has already laid claim to 'sev_enabled'.
Reviewed-by: NTom Lendacky <thomas.lendacky@amd.com>
Reviewed-by: NBrijesh Singh <brijesh.singh@amd.com>
Signed-off-by: NSean Christopherson <seanjc@google.com>
Message-Id: <20210422021125.3417167-5-seanjc@google.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>