dt-bindings: batterydata: Add snapshot

Add snapshot of batterydata dt-bindings as of msm-4.14
'commit 7e16ff6c ("defconfig: qcs405: enable WLAN configs for 32-bit
QCS405")'.

Change-Id: Id4a50a66b48a59b9ef4bb96ecd6f37e56f4613c1
Signed-off-by: Guru Das Srinagesh <gurus@codeaurora.org>