Integrate uboot-imx-kuk/pbb-debug-port-gpios-2

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Commit: seco-ne/3rd-party/kuk/uboot-imx-kuk@9b7085a3

pbb:debug console: Configure iomux for the debug console gpios

To switch between debug and RS485 port the gpios needs to be setup
correctly.

BCS 746-001120