hv: fix 'No brackets to then/else'

- add missing brackets for 'if/else' statements based on MISRA-C
  requirements

v1 -> v2:
 * add brackets for each conditions in 'if' statements to improve
   the readability
 * modify 'ptdev_init' to make the logic clearer

Tracked-On: #861
Signed-off-by: Shiqing Gao <shiqing.gao@intel.com>

hypervisor/common/hypercall.c

@@ -38,8 +38,9 @@ int32_t hcall_sos_offline_cpu(struct vm *vm, uint64_t lapicid)
 	foreach_vcpu(i, vm, vcpu) {
 		if (vlapic_get_apicid(vcpu_vlapic(vcpu)) == lapicid) {
 			/* should not offline BSP */
-			if (vcpu->vcpu_id == BOOT_CPU_ID)
+			if (vcpu->vcpu_id == BOOT_CPU_ID) {
 				return -1;
+			}
 			pause_vcpu(vcpu, VCPU_ZOMBIE);
 			reset_vcpu(vcpu);
 			destroy_vcpu(vcpu);
@@ -237,8 +238,9 @@ int32_t hcall_reset_vm(uint16_t vmid)
 {
 	struct vm *target_vm = get_vm_from_vmid(vmid);
 
-	if ((target_vm == NULL) || is_vm0(target_vm))
+	if ((target_vm == NULL) || is_vm0(target_vm)) {
 		return -1;
+	}
 
 	reset_vm(target_vm);
 	return 0;

hypervisor/common/ptdev.c

@@ -127,8 +127,9 @@ release_all_entries(struct vm *vm)
 	list_for_each_safe(pos, tmp, &ptdev_list) {
 		entry = list_entry(pos, struct ptdev_remapping_info,
 				entry_node);
-		if (entry->vm == vm)
+		if (entry->vm == vm) {
 			release_entry(entry);
+		}
 	}
 }
 
@@ -191,8 +192,9 @@ ptdev_deactivate_entry(struct ptdev_remapping_info *entry)
 
 void ptdev_init(void)
 {
-	if (get_cpu_id() > 0)
+	if (get_cpu_id() != BOOT_CPU_ID) {
 		return;
+	}
 
 	INIT_LIST_HEAD(&ptdev_list);
 	spinlock_init(&ptdev_lock);

hypervisor/common/softirq.c

@@ -39,8 +39,9 @@ void do_softirq(void)
 
 	while (true) {
 		nr = ffs64(*softirq_pending_bitmap);
-		if (nr >= NR_SOFTIRQS)
+		if (nr >= NR_SOFTIRQS) {
 			break;
+		}
 
 		bitmap_clear_lock(nr, softirq_pending_bitmap);
 		(*softirq_handlers[nr])(cpu_id);