ARM: dts: msm: enable wakeable spmi interrupts for mdm9630

Remove the qcom,not-wakeup property from the spmi bus device node on
mdm9630 so that spmi interrupts can take the device out of suspend.

Change-Id: I4a3cacf0dea5abbe65aa3046527d39da88c89b9b
Signed-off-by: Xiaozhe Shi <xiaozhes@codeaurora.org>