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Changes
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→Power rails and related signals
* NVCC_SD3_EXT: this rail powers MX6's NVCC_SD3 domain
* NVCC_LCD_EXT: this rail powers MX6's NVCC_LCD domain
* NVCC_AXEL_I/O_3.3V/1.8V: this output signal is used to indicate when carrier board's circuitry interfacing Axel's I/Os has to be powered up. '''N.B.''' : Proper usage of this pin requires to connect it to an AND port together with the PMIC_PWRON signal, wiring the output of the port to the enable pin of the switch mounted on the carrier board. This interconnect is necessary because deasserting the PMIC_PWRON signal is not sufficient to properly reset all the PMIC power voltages.
* VGEN1: PMIC's VGEN1 regulator output; this regulator is not used by any Axel's internal load. Output voltage can be selected by user.
* VGEN2: PMIC's VGEN2 regulator output; this regulator is not used by any Axel's internal load. Output voltage can be selected by user.
