config_tools: update scenario xml file on ehl-crb-b platform
for ehl-crb-b platform, update sos rootfs from "dev/sda3"
to "/dev/nvme0n1p3" in hybrid.xml file.
<pci_dev/>
</pci_devs>
<board_private>
- <rootfs>/dev/sda3</rootfs>
+ <rootfs>/dev/nvme0n1p3</rootfs>
<bootargs>
rw rootwait console=tty0 consoleblank=0 no_timer_check quiet loglevel=3
i915.nuclear_pageflip=1 swiotlb=131072
