ARM: dts: msm: Add VMBMS device node for PM8916

The VMBMS is the voltage-based battery monitoring driver
supported on PM8916. It calculates the SOC(state-of-charge)
of the battery.

Change-Id: I53dfc3cfb5631523f65844b447614f67e505758c
Signed-off-by: Anirudh Ghayal <aghayal@codeaurora.org>