Revert "yamltree: Ensure consistent bracketing of properties with phandles"

This reverts commit 18d7b2f4.

This doesn't work for properties such as 'interrupt-map' that has
phandle in the middle of an entry. It would also not work for a 0 or -1
phandle value that acts as a NULL.

Signed-off-by: Rob Herring <robh@kernel.org>
Message-Id: <20200124144657.29749-1-robh@kernel.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>