Restrict disk IO processes to one core

This prevents performance deterioration probably due
to cache flushing as threads bounce around the cores.
For example, before:
write at 14 mb/s
read at 19 mb/s

after:
write at 23 mb/s
read at 20 mb/s
Sensors: Invensense v5.1.5 IIO driver
Point kernel to the right direction after Inverse driver update
Remove absolete files