ARM: dts: msm: Allow spmi-arb interrupts to wakeup device

Remove the 'qcom,not-wakeup' flag from the mdmcalifornium device
tree to allow spmi-arb interrupts to be wakeup capable.

Change-Id: Id41b726d37a8fe3e38a71cd64d72b23bd4367f49
Signed-off-by: Devesh Jhunjhunwala <deveshj@codeaurora.org>