* Disable all UART TX pins (switch to GPIO)
* Disable SPI3 (switch to GPIO)
* Disable eHRPWMs (switch to GPIO)
* Match power-on pull-up/down status where possible
* Enable GPIOs on alternate pins (ie., other shorted pin is PRU input, UART RX, eQEP, etc.)
* Enable GPIOs for all pins not otherwise enabled
* On eQEP shorted pins, pull-down on eQEP and no-pull on GPIO
* On UART/PRU shorted pins, pull-down on GPIO and no-pull on UART/PRU
* Add pull-downs on UART-only pins (console)
* Correct voltages for vddshv1 and vddshv7 (3.3V)

NOTE: for the actual submission, I will disable the UART TX
and EHRPWM pins, but leave the iodelay setup for them to avoid
doing any damage to capes that might not use these modes.

Added Fritzing AI part and diagram

firmware: brcm: mainline brcmfmac allows you to specify a device spec…

firmware: brcm: mainline brcmfmac allows you to specify a device specific firmware based on the dts compatible flag

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>