Here is the patch. It is rather big because there is some renaming and
cleanups.  This patch bring 2.5 in line with 2.4.20: perfmon-1.3

It adds:
        - idle task exclusion
        - less ctxsw overhead in system wide
        - cleanups most of the inline asm
        - don't use PAL anymore to determine PMU features
        - added temporary hooks for custom overflow handlers (VTUNE/Oprofile)
        - renaming of the perfmon init functions

Thanks.