Overclocking and undervolting options

Signed-off-by: flar2 <asegaert@gmail.com>
Adjust Makefiles

Signed-off-by: flar2 <asegaert@gmail.com>
DRIVERS: SLIMBUS: initial overclocking of slimbus .Increase root freq from 11 (24.526MHz) to 31 max (27+MHz) which is the largest it will take .Increase clock gear from 7 to 10 (max again)

This means SLIMbus will use its maximum potential to give the best audio quality for the hardware. Takes advantage of both hardware and the mods from zeroinfinity, also opening the door for more things that were previously limited by this. Researched and experimented by ZeroInfinity and Poondog

Signed-off-by: poondog <markj338@gmail.com>
Signed-off-by: flar2 <asegaert@gmail.com>
Overclocking: fix and add more steps

Signed-off-by: flar2 <asegaert@gmail.com>