[PATCH] replace instance of SA_SHIRQ with IRQF_SHARED

[Maarten M. <mad...@gm...>]

The use of SA_* is slowly being removed, at least that's my
impression. I use a realtime kernel and it was gone, it seems a
similar thing might happen for other kernels in the near future (-mm
for 2.6.21).

Maarten.