get DDR freq

echo userspace > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
echo 2016000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq
echo 2016000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
cat /sys/kernel/debug/clk/bimc_clk/measure