ARM: dts: msm: Add support for pronto pil

Pronto PIL facilitates the image loading and authentication
for wcnss subsystem and smp2p device tree entries for
wcnss subsytem restart.

Change-Id: I97abdfcd1f41903e04304c771338bc7a3a30e833
Signed-off-by: Rajkumar Raghupathy <raghup@codeaurora.org>