Revert "root: Use busybox blkid/cut for GPE checks"

This reverts commit 0844f91e5bfefefc60a086d378e0fd60bfb6f893.

Conflicts:
	rootdir/etc/gpecheck.sh
Revert "Swap fstab at init if GPE"

This reverts commit b28c24cb2d1ff3744d34c8811d4632019c5188ea.

Conflicts:
	rootdir/etc/gpe-fstab.qcom