[Intrepid] SRU: 2.6.27.22 worthy ath9k updates

[Stefan Bader]

Stefan Bader wrote:
> SRU Justification:
> 
> Impact: SMP machines can hang when using PCI based atheros devices (not 
> PCI express).
> 
> Fix: Two cherry picks from 2.6.27.22 stable
> 
> Testcase: Network traffic on SMP based hosts with Atheros pci based devices
> 
> Note: Those have been proposed by Luis (maintainer)
> 
Applied to Intrepid in-kernel and LBM versions.

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