Added initial board support for the pconxs
Sanitized USDHC initialization order
Reset the WiBear11n chip in the boot loader
Remove unused SDHC2 configuration, and integrate WiBear11n initialization with the existing MMC initialization.

Configuring all pins used by the WiBear11n modules helps to stay sane.
Use the correct primary ethernet device 'FEC'
Reverse MAC address bytes on read-out. Are they programmed in the wrong order to begin with?
Expect a zImage
Configured the GPIOs in u-boot, and implement keep-alive using one of them
Configure 6 additional GPIO pins for two pairs of RGB LEDs
Manipulate power_hold of the U100
Fixed polarity of the power_hold pin. The U100 keeps on after power up.
Turn off LEDs on power-up