[Feature] DFS mount auto by kernel parameters (#8989)

DFS mount auto by kernel parameters

1.Mount the rootfs options by parameters:
- root=: root device, like vda1, sda1, sd0p1, nvme0n0p1...
- rootfstype=: root file system type, like elm, ext, crom...
- rw/ro: root is readonly or all enable, if not have 'rw' flag,
         the 'ro' flag is default.
- rootwait: always wait for root device status is OK.
- rootdelay=: mount rootfs delay amount of time (millisecond).

2.Mount the other fs options by `fstab.sh`, it will read the script
after root mount is OK, it's format is a list of mount cmds in MSH:

mount vda2 /mnt elm
mount 192.168.1.1:/ /mnt/remote nfs

Signed-off-by: GuEe-GUI <[email protected]>

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