KVM: x86/mmu: Collapse kvm_flush_remote_tlbs_with_{range,address}() together

Collapse kvm_flush_remote_tlbs_with_range() and
kvm_flush_remote_tlbs_with_address() into a single function. This
eliminates some lines of code and a useless NULL check on the range
struct.

Opportunistically switch from ENOTSUPP to EOPNOTSUPP to make checkpatch
happy.
Signed-off-by: David Matlack <dmatlack@google.com>
Link: https://lore.kernel.org/r/20230126184025.2294823-4-dmatlack@google.comSigned-off-by: Sean Christopherson <seanjc@google.com>

arch/x86/kvm/mmu/mmu.c

@@ -261,27 +261,20 @@ static inline bool kvm_available_flush_tlb_with_range(void)
 	return kvm_x86_ops.tlb_remote_flush_with_range;
 }
 
-static void kvm_flush_remote_tlbs_with_range(struct kvm *kvm,
-		struct kvm_tlb_range *range)
-{
-	int ret = -ENOTSUPP;
-
-	if (range && kvm_x86_ops.tlb_remote_flush_with_range)
-		ret = static_call(kvm_x86_tlb_remote_flush_with_range)(kvm, range);
-
-	if (ret)
-		kvm_flush_remote_tlbs(kvm);
-}
-
 void kvm_flush_remote_tlbs_with_address(struct kvm *kvm,
 		u64 start_gfn, u64 pages)
 {
 	struct kvm_tlb_range range;
+	int ret = -EOPNOTSUPP;
 
 	range.start_gfn = start_gfn;
 	range.pages = pages;
 
-	kvm_flush_remote_tlbs_with_range(kvm, &range);
+	if (kvm_x86_ops.tlb_remote_flush_with_range)
+		ret = static_call(kvm_x86_tlb_remote_flush_with_range)(kvm, &range);
+
+	if (ret)
+		kvm_flush_remote_tlbs(kvm);
 }
 
 static gfn_t kvm_mmu_page_get_gfn(struct kvm_mmu_page *sp, int index);