KVM: X86/MMU: Remove useless mmu_topup_memory_caches() in kvm_mmu_pte_write()

Since the commit c5e2184d("KVM: x86/mmu: Remove the defunct
update_pte() paging hook"), kvm_mmu_pte_write() no longer uses the rmap
cache.

So remove mmu_topup_memory_caches() in it.

Cc: Sean Christopherson <seanjc@google.com>
Signed-off-by: Lai Jiangshan <jiangshan.ljs@antgroup.com>
Message-Id: <20220605063417.308311-6-jiangshanlai@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

arch/x86/kvm/mmu/mmu.c

@@ -5326,13 +5326,6 @@ static void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
 
 	pgprintk("%s: gpa %llx bytes %d\n", __func__, gpa, bytes);
 
-	/*
-	 * No need to care whether allocation memory is successful
-	 * or not since pte prefetch is skipped if it does not have
-	 * enough objects in the cache.
-	 */
-	mmu_topup_memory_caches(vcpu, true);
-
 	write_lock(&vcpu->kvm->mmu_lock);
 
 	gentry = mmu_pte_write_fetch_gpte(vcpu, &gpa, &bytes);