Use __WFI() instead of asm("wfi") for better readability.

left/src/main.c

@@ -40,6 +40,6 @@ int main(void)
 #endif
     while (1) {
         KeyMatrix_Scan(&keyMatrix);
-        asm("wfi");
+        __WFI();
     }
 }

right/src/main.c

@@ -99,7 +99,7 @@ void main() {
                 IsConfigInitialized = true;
             }
             UpdateUsbReports();
-            asm("wfi");
+            __WFI();
         }
     }
 }