Core: Convert logging over to fmt pt.2

Continues the core migration of logs up to the EXI handling code.

Source/Core/Core/FifoPlayer/FifoPlayer.cpp

@@ -99,7 +99,7 @@ public:
   {
     // NOTE: AdvanceFrame() will get stuck forever in Dual Core because the FIFO
     //   is disabled by CPU::EnableStepping(true) so the frame never gets displayed.
-    PanicAlertT("Cannot SingleStep the FIFO. Use Frame Advance instead.");
+    PanicAlertFmtT("Cannot SingleStep the FIFO. Use Frame Advance instead.");
   }
 
   const char* GetName() const override { return "FifoPlayer"; }