boards: rp2040: set startup-delay-multiplier for applicable boards#82622

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

xudongzheng:rp2040-xosc-default-prxudongzheng/zephyr:rp2040-xosc-default-prCopy head branch name to clipboard