[RFC][patch 00/44] Consolidate irq_action flags

The recent interrupt rework introduced bit value conflicts with sparc.
Instead of introducing new architecture flags mess, move the interrupt
SA_ flags out of the signal namespace and replace them by interrupt
related flags.

This allows to remove the obsolete SA_INTERRUPT flag and clean up
the bit field values.

The patch was mostly created by a script, manually fixed up and reviewed.
Compile tested on various platforms. Boot tested on i386/x86_64

tglx
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