Hardcode frequency on Apple Silicon

On Apple Silicon, PPCTimer estimates a terribily inaccurate RSTSC frequency and results in games (specifically tested Color Splash & MK8) run extremely fast especially in the title screens which unsurpisingly doesn't work that well.
The value hardcoded is the same frequency as on Rosetta.
Admittedly this probably isn't the best solution however it is accurate and it works.

Author: exverge-0

src/util/highresolutiontimer/HighResolutionTimer.cpp

@@ -27,6 +27,8 @@ uint64 HighResolutionTimer::m_freq = []() -> uint64 {
 	LARGE_INTEGER freq;
 	QueryPerformanceFrequency(&freq);
 	return (uint64)(freq.QuadPart);
+#elif BOOST_OS_MACOS && defined(__arm64__)
+	return 1000000000;
 #else
     timespec pc;
     clock_getres(CLOCK_MONOTONIC_RAW, &pc);