Stefan Kalkowski 0836726df2 hw: use one IRQ for all cpus to send IPIs
Until now, one distinct software generated IRQ per cpu was used to
send signals between cpus. As ARM's GIC has 16 software generated
IRQs only, and they need to be partitioned between secure/non-secure
TrustZone world as well as virtual and non-virtual worlds, we should
save them.

Ref #1405
2015-02-27 11:43:56 +01:00
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