KVM: x86: Uncondtionally skip MMU sync/TLB flush in MOV CR3's PGD switch

Stop leveraging the MMU sync and TLB flush requested by the fast PGD
switch helper now that kvm_set_cr3() manually handles the necessary sync,
frees, and TLB flush.  This will allow dropping the params from the fast
PGD helpers since nested SVM is now the odd blob out.
Signed-off-by: NSean Christopherson <seanjc@google.com>
Message-Id: <20210609234235.1244004-6-seanjc@google.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

arch/x86/kvm/x86.c

@@ -1115,7 +1115,7 @@ int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
 		return 1;
 
 	if (cr3 != kvm_read_cr3(vcpu))
-		kvm_mmu_new_pgd(vcpu, cr3, skip_tlb_flush, skip_tlb_flush);
+		kvm_mmu_new_pgd(vcpu, cr3, true, true);
 
 	vcpu->arch.cr3 = cr3;
 	kvm_register_mark_available(vcpu, VCPU_EXREG_CR3);