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Activate an unused clock generator with source DFLL (48Mhz) and divisor 6 to generate 8Mhz. This is useful for running ADCs (max frequency for ADC) and for running the sd-card clock that otherwise introduces a lot of noise to the ADC. The ADC is what measures touch.
The previous used clock (48Mhz) introduces a lot of noise on the ADC.
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These delays has been determined empirically that they are needed. They were also added by us to the previous version of the drivers.
During testing it was shown that sd_mmc_check often returns NO_CARD on the first call.
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