Retuned kernel as Real Linux system. + MORE

Removed GPU freq below 108Mhz never worked any way.
Rised voltage for GPU 108Mhz to 950mv for stability.

discovered that if we use dirty_background_ratio more than 20
and dirty_ratio more than 20 , then transfering big file over usb
will SOD our device, we have low mem! so system push all to buffers
and kill the main service by OOM! game over.

i have set to 10 both values, transfered 700MB file on 11MB/s to storage
and using vmstat i seen that WA = disk utilization finished working when file was
trasfered, as expected! no delays no sods.

buffer state was 220MB! more than that is SOD.
we need more RAM! :)