samples: out_of_tree_driver: Add readme to out of tree sample

Add reade to out of tree sample.

Signed-off-by: Joakim Andersson <joakim.andersson@nordicsemi.no>
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Joakim Andersson 2020-03-24 17:09:02 +01:00 committed by Carles Cufí
parent f5ec251c8f
commit 7e04752f99

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.. _out_of_tree_driver:
Out Of Tree Driver
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Overview
********
A simple example that demonstrates custom zephyr drivers using the zephyr driver
API that are maintained outside of Zephyr.