power: Fix a few compiler warnings

* And unify styling a little bit

Change-Id: I7f9bb43a534e352fdd7693ff975749864f8addb3

power-common.c

@@ -78,11 +78,9 @@ void power_hint(power_hint_t hint, void *data)
         return;
     }
     switch(hint) {
-        case POWER_HINT_VSYNC:
-        break;
         case POWER_HINT_VR_MODE:
             ALOGI("VR mode power hint not handled in power_hint_override");
-            break;
+        break;
         case POWER_HINT_INTERACTION:
         {
             int resources[] = {0x702, 0x20F, 0x30F};
@@ -100,16 +98,16 @@ void power_hint(power_hint_t hint, void *data)
 
                 if (handles[hint].handle > 0)
                     handles[hint].ref_count++;
-            }
-            else
+            } else {
                 if (handles[hint].handle > 0) {
                     if (--handles[hint].ref_count == 0) {
                         release_request(handles[hint].handle);
                         handles[hint].handle = 0;
                     }
-                }
-                else
+                } else {
                     ALOGE("Lock for hint: %X was not acquired, cannot be released", hint);
+                }
+            }
         break;
         default:
         break;