CPU (macOS): try fixing CPU freq detection on Apple M4

Fix #1394

Author: CarterLi

src/detection/cpu/cpu_apple.c

@@ -59,7 +59,12 @@ static const char* detectFrequency(FFCPUResult* cpu)
         pMax = pMax > pStart[i] ? pMax : pStart[i];
 
     if (pMax > 0)
-        cpu->frequencyMax = pMax / 1000 / 1000;
+    {
+        if (pMax > 100000000) // Assume that pMax is in MHz, M1~M3
+            cpu->frequencyMax = pMax / 1000 / 1000;
+        else // Assume that pMax is in kHz, M4 and later (#1394)
+            cpu->frequencyMax = pMax / 1000;
+    }
 
     return NULL;
 }