ARM: dts: msm: Add support for voice svc driver

Add a new device that can be used by the voice svc
driver to allow userspace clients to send IOCTL
commands.

CRs-fixed: 662362
Change-Id: I509cbdea6ea28070bd7325b58d8abfbe4163f2a3
Signed-off-by: Vicky Sehrawat <vickys@codeaurora.org>
Signed-off-by: Karthik Reddy Katta <a_katta@codeaurora.org>