Revert "arm64: Layerscape: Survive LPI one-way reset workaround"

Ad-hoc bindings that are not part of the upstream device tree / bindings
are not allowed in-tree.  Only bindings that are in-progress with
upstream and then re-synced once agreed upon are.

This reverts commit af288cb2.

Cc: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Cc: Priyanka Jain <priyanka.jain@nxp.com>
Reported-by: Michael Walle <michael@walle.cc>
Signed-off-by: Tom Rini <trini@konsulko.com>
Acked-by: Marc Zyngier <maz@kernel.org>