qcom: soc: pil-mss: Add halt bases for modem pil

MSM8916 halt bases used during the subsystem restart
to halt the Modem subsystem are in different 4K pages
for Q6, Modem and NC. Add support to take as input the
different bases from device tree.

Change-Id: I78a23c887caead7306a92942799b409e300fc848
Signed-off-by: Taniya Das <tdas@codeaurora.org>