Always set noatime no diratime on all partitions! I/O Boost!

Also mod read_ahead to 512. as seems that is faster! in test apps.

(cherry picked from commit b5e205436e63ffe7669944270fcd02e0f38dfd19)
Always set noatime no diratime on all partitions! I/O Boost! V2

(cherry picked from commit e749f7bb6429c33883a1463df6bea4c3161b930e)
Revert "Add OC to 644 MHz and idle on 120MHz"

This reverts commit e66ba655c98ea13d70ccc74dfa5e48532d74c835.
More GPU Steps, GPU OC and idle on 27MHz

Adapted from Ark Kernel for One Plus One.