[PATCH] ia64: oprofile support

[PATCH] ia64: oprofile support

I have revised the oprofile patch for ia64 to provide just the basic
timer interrupt mechanism to avoid interferring with the perfmon 2.0
support. I have verified the oprofile ia64 patch applies cleanly and
build a working kernel with the 2.6.0-test4 kernel and the
linux-2.6.0-test4-ia64-030826.diff.bz2 patch.

More work is required to get oprofile to work with the perfmon 2.0.
However, the patch as it is currently implements should not cause
problems for the perfom 2.0 support.