ARM: dts: msm: Add LPASS SMP2P entries for the MSM Samarium

Add the input and output GPIO nodes to allow the LPASS
subsystem restart driver to use the associated SMP2P
bits.

Change-Id: If3088db77b357ea6a99311ba2ce44a5753a8a2e9
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>