Integrate uboot-imx-kuk/pbb-tr8mp-debug-cable

Commit: seco-ne/3rd-party/kuk/uboot-imx-kuk@23a99ad1

pbb: Add pbb debug_cable signal to hog

Also merge bootselect and UART_TXEN for pbb, but untested. BCS 746-001288

Source merge request: seco-ne/3rd-party/kuk/uboot-imx-kuk!111 (merged)

mentioned in merge request seco-ne/3rd-party/kuk/uboot-imx-kuk!111 (merged)

merged