Guard ThreadPowerThrottling block with #if defined(_MSC_VER) to avoid MinGW compile errors

Author: B1rds3y

ggml/src/ggml-cpu/ggml-cpu.c

@@ -2429,6 +2429,8 @@ static bool ggml_thread_apply_priority(int32_t prio) {
         // Newer Windows 11 versions aggresively park (offline) CPU cores and often place
         // all our threads onto the first 4 cores which results in terrible performance with
         // n_threads > 4
+        #if defined(_MSC_VER)
+
         #if _WIN32_WINNT >= 0x0602
         THREAD_POWER_THROTTLING_STATE t;
         ZeroMemory(&t, sizeof(t));
@@ -2441,6 +2443,7 @@ static bool ggml_thread_apply_priority(int32_t prio) {
             return false;
         }
         #endif
+        #endif
     }
 
     if (prio == GGML_SCHED_PRIO_NORMAL) {