linux-phytec-fsl

tps65090: Update bindings for subnode

This updates the DT documentation to reflect that the tps65090-charger
should be represented as a child node of the tps65090 device itself.

Signed-off-by: Rhyland Klein <rklein@nvidia.com>
Signed-off-by: Anton Vorontsov <anton@enomsg.org>