Add description for nxp,mcux-edma 'dma-requests' and 'dma-channels'#97755

cfriedt merged 2 commits intozephyrproject-rtos:mainzephyrproject-rtos/zephyr:mainfrom

nxp-upstream:fix-dma-request-issuenxp-upstream/zephyr:fix-dma-request-issueCopy head branch name to clipboard