ARM: dts: msm: Enable mss PIL loading for LW targets

Due to a hw bug, PIL loading for modem is enabled in
order for modem to program certain hardware components
without sending gpio interrupts.

Change-Id: I2375cbbe64d5350989db36c8cdb504135da84ed5
Signed-off-by: Deepak Katragadda <dkatraga@codeaurora.org>