video_core: Remove unnecessary enum class casting in logging messages

fmt now automatically prints the numeric value of an enum class member
by default, so we don't need to use casts any more.

Reduces the line noise a bit.

src/video_core/gpu.cpp

@@ -299,8 +299,7 @@ void GPU::CallPullerMethod(const MethodCall& method_call) {
         break;
     }
     default:
-        LOG_ERROR(HW_GPU, "Special puller engine method {:X} not implemented",
-                  static_cast<u32>(method));
+        LOG_ERROR(HW_GPU, "Special puller engine method {:X} not implemented", method);
         break;
     }
 }
@@ -379,7 +378,7 @@ void GPU::ProcessBindMethod(const MethodCall& method_call) {
         dma_pusher->BindSubchannel(kepler_memory.get(), method_call.subchannel);
         break;
     default:
-        UNIMPLEMENTED_MSG("Unimplemented engine {:04X}", static_cast<u32>(engine_id));
+        UNIMPLEMENTED_MSG("Unimplemented engine {:04X}", engine_id);
     }
 }
 
@@ -392,8 +391,7 @@ void GPU::ProcessFenceActionMethod() {
         IncrementSyncPoint(regs.fence_action.syncpoint_id);
         break;
     default:
-        UNIMPLEMENTED_MSG("Unimplemented operation {}",
-                          static_cast<u32>(regs.fence_action.op.Value()));
+        UNIMPLEMENTED_MSG("Unimplemented operation {}", regs.fence_action.op.Value());
     }
 }