CPUInfo: add fast_atan2

Tools/CPUInfo/CPUInfo.pde

@@ -121,6 +121,7 @@ static void show_timings(void)
 	TIMEIT("acos()", v_out = acosf(v_f * 0.2), 20);
 	TIMEIT("asin()", v_out = asinf(v_f * 0.2), 20);
 	TIMEIT("atan2()", v_out = atan2f(v_f * 0.2, v_f * 0.3), 20);
+	TIMEIT("fast_atan2()", v_out = fast_atan2(v_f * 0.2, v_f * 0.3), 20);
 	TIMEIT("sqrt()",v_out = sqrtf(v_f), 20);
 
 	TIMEIT("iadd8", v_out_8 += v_8, 100);