defconfig: msm: Configure IPC_ROUTER Node ID for sdxpoorwills-auto

Configure the IPC_ROUTER Node ID as 2 for sdxpoorwills-auto
since this target may be used as a device to an APQ or MSM host.

Change-Id: I16cac4c3037668e0b609d4fabc131d1b9179fa35
Signed-off-by: Gustavo Solaira <gustavos@codeaurora.org>