ARM: dts: msm: Add rpm-smd irq number for qcs405

Add rpm-smd irq number for qcs405. This IRQ used by remote
processor to inform APSS about reception of response message packet.

Change-Id: I5546e180696e071c0fc2f63c2737c074246d55e6
Signed-off-by: Raghavendra Kakarla <rkakarla@codeaurora.org>