Add functionality for frequency governor

[YCH01001]

Add functionality for frequency governor
On - Off - Handheld Only

Handheld can bring good battery life to SWITCH, but don’t worry about it in Docked, it’s very troublesome to switch every time

[hanai3Bi]

okay will make it configurable in sys-clk ini file

[hanai3Bi]

Feature implemented. will be included in next version.

I think current setting of enabling governor for all titles when governor is enabled is fine, because i think it's rare that someone would want to use governor only on very specific titles and not use for rest

[hanai3Bi]

closed as new version came out