KVM: x86: eliminate some unreachable code

These code are unreachable, remove them.
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Krish Sadhukhan <krish.sadhukhan@oracle.com>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

arch/x86/kvm/vmx/vmx.c

@@ -4550,7 +4550,6 @@ static bool rmode_exception(struct kvm_vcpu *vcpu, int vec)
 	case GP_VECTOR:
 	case MF_VECTOR:
 		return true;
-	break;
 	}
 	return false;
 }

arch/x86/kvm/x86.c

@@ -3077,7 +3077,6 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
 		break;
 	case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff:
 		return kvm_x2apic_msr_read(vcpu, msr_info->index, &msr_info->data);
-		break;
 	case MSR_IA32_TSCDEADLINE:
 		msr_info->data = kvm_get_lapic_tscdeadline_msr(vcpu);
 		break;
@@ -3160,7 +3159,6 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
 		return kvm_hv_get_msr_common(vcpu,
 					     msr_info->index, &msr_info->data,
 					     msr_info->host_initiated);
-		break;
 	case MSR_IA32_BBL_CR_CTL3:
 		/* This legacy MSR exists but isn't fully documented in current
 		 * silicon.  It is however accessed by winxp in very narrow
@@ -8484,7 +8482,6 @@ static inline int vcpu_block(struct kvm *kvm, struct kvm_vcpu *vcpu)
 		break;
 	default:
 		return -EINTR;
-		break;
 	}
 	return 1;
 }