CPU clock settings for ESP32 and ESP32-C3 #110
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* CPU clock settings for ESP32 and ESP32-C3 * Minor improvements to the ESP32 clock setting code
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This adds a way to configure the CPU clock for ESP32 and ESP32-C3 to 80,160 and for the ESP32 to 240 MHz.
Other chips will follow in separate PR(s)
Unfortunately, on the Xtensas we need a ROM function - maybe we can replace it someday but for now I think it's okay
Also, on ESP32 the code assumes 40MHz XTAL - it's the same thing that NuttX does so I guess it's fine for now and I we ever run into issues we can extend the code.
This is a non-breaking change.
I didn't add any examples for this since they would be pretty boring