revert to a simple counter for system_time, using _hz_200 seems to get it stuck.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26100 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/system/boot/platform/atari_m68k/cpu.cpp

@@ -105,8 +105,8 @@ extern "C" bigtime_t
 system_time(void)
 {
 	// _hz_200
-	return (*TOSVAR_hz_200) * 1000000LL / 200;
-	//return gSystemTimeCounter++;
+	//return (*TOSVAR_hz_200) * 1000000LL / 200;
+	return gSystemTimeCounter++;
 }