KVM: x86: Fix fall-through warnings for Clang

In preparation to enable -Wimplicit-fallthrough for Clang, fix a couple
of warnings by explicitly adding break statements instead of just letting
the code fall through to the next case.

Link: https://github.com/KSPP/linux/issues/115Signed-off-by: NGustavo A. R. Silva <gustavoars@kernel.org>
Message-Id: <20210528200756.GA39320@embeddedor>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

arch/x86/kvm/cpuid.c

@@ -655,6 +655,7 @@ static int __do_cpuid_func_emulated(struct kvm_cpuid_array *array, u32 func)
 		if (kvm_cpu_cap_has(X86_FEATURE_RDTSCP))
 			entry->ecx = F(RDPID);
 		++array->nent;
+		break;
 	default:
 		break;
 	}

arch/x86/kvm/vmx/vmx.c

@@ -6247,6 +6247,7 @@ void vmx_set_virtual_apic_mode(struct kvm_vcpu *vcpu)
 	switch (kvm_get_apic_mode(vcpu)) {
 	case LAPIC_MODE_INVALID:
 		WARN_ONCE(true, "Invalid local APIC state");
+		break;
 	case LAPIC_MODE_DISABLED:
 		break;
 	case LAPIC_MODE_XAPIC: