Added lower cpu clock options, down to 408MHz (lowest possible) (#300)

Author: frysee

workspace/all/minarch/minarch.c

@@ -4369,7 +4369,6 @@ static void video_refresh_callback(const void* data, unsigned width, unsigned he
 }
 ///////////////////////////////
 
-// NOTE: sound must be disabled for fast forward to work...
 static void audio_sample_callback(int16_t left, int16_t right) {
 	if (!fast_forward || ff_audio) {
 		if (use_core_fps) {

workspace/tg5040/platform/platform.c

@@ -2222,7 +2222,7 @@ void *PLAT_cpu_monitor(void *arg) {
     double prev_real_time = get_time_sec();
     double prev_cpu_time = get_process_cpu_time_sec();
 
-    const int cpu_frequencies[] = {600,650,700,750, 800,850,900,950, 1000,1050,1100,1150, 1200,1250,1300,1350, 1400,1450,1500,1550, 1600,1650,1700,1750, 1800,1850,1900,1950, 2000};
+	const int cpu_frequencies[] = {408,450,500,550,  600,650,700,750, 800,850,900,950, 1000,1050,1100,1150, 1200,1250,1300,1350, 1400,1450,1500,1550, 1600,1650,1700,1750, 1800,1850,1900,1950, 2000};
     const int num_freqs = sizeof(cpu_frequencies) / sizeof(cpu_frequencies[0]);
     int current_index = 5;