ARM: dts: qcom: Add the lpass PIL device for MSM8994

Add a device node to allow the PIL driver to probe the
lpass device and bring the lpass subsystem out of reset.

Change-Id: I6a1fd88a0954ab36bc950984f26ae72b204c5202
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>