i386: always fill Hyper-V CPUID feature leaves from X86CPU data

We have all the required data in X86CPU already and as we are about to
split hyperv_handle_properties() into hyperv_expand_features()/
hyperv_fill_cpuids() we can remove the blind copy. The functional change
is that QEMU won't pass CPUID leaves it doesn't currently know about
to the guest but arguably this is a good change.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20210422161130.652779-4-vkuznets@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>

target/i386/kvm/kvm.c

@@ -1208,9 +1208,6 @@ static int hyperv_handle_properties(CPUState *cs,
     }
 
     if (cpu->hyperv_passthrough) {
-        memcpy(cpuid_ent, &cpuid->entries[0],
-               cpuid->nent * sizeof(cpuid->entries[0]));
-
         c = cpuid_find_entry(cpuid, HV_CPUID_VENDOR_AND_MAX_FUNCTIONS, 0);
         if (c) {
             cpu->hyperv_vendor_id[0] = c->ebx;
@@ -1310,12 +1307,6 @@ static int hyperv_handle_properties(CPUState *cs,
         goto free;
     }
 
-    if (cpu->hyperv_passthrough) {
-        /* We already copied all feature words from KVM as is */
-        r = cpuid->nent;
-        goto free;
-    }
-
     c = &cpuid_ent[cpuid_i++];
     c->function = HV_CPUID_VENDOR_AND_MAX_FUNCTIONS;
     c->eax = hyperv_feat_enabled(cpu, HYPERV_FEAT_EVMCS) ?