dt-bindings: qcom: qpnp-qg: Add snapshot

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

Change-Id: I2652ac202a6451740e22cdceda5577fa324cf818
Signed-off-by: Guru Das Srinagesh <gurus@codeaurora.org>