x86: Return IRQ_SET_MASK_OK_NOCOPY from irq affinity functions

The interrupt chip irq_set_affinity() functions copy the affinity mask
to irq_data->affinity but return 0, i.e. IRQ_SET_MASK_OK.
IRQ_SET_MASK_OK causes the core code to do another redundant copy.

Return IRQ_SET_MASK_OK_NOCOPY to avoid this.

Signed-off-by: Jiang Liu <[email protected]>
Cc: Suresh Siddha <[email protected]>
Cc: Yinghai Lu <[email protected]>
Cc: Naga Chumbalkar <[email protected]>
Cc: Jacob Pan <[email protected]>
Cc: Cliff Wickman <[email protected]>
Cc: Jiang Liu <[email protected]>
Cc: Keping Chen <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Thomas Gleixner <[email protected]>

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