As eventid field was expanded to support new mesh versions, it started to
overlap with wp_combine field. Move wp_combine to fix the issue.

Fixes: 23760a01 ("perf/arm-cmn: Add CMN-700 support")
Signed-off-by: Ilkka Koskinen <ilkka@os.amperecomputing.com>
Link: https://lore.kernel.org/r/20230301175540.19891-1-ilkka@os.amperecomputing.comSigned-off-by: Will Deacon <will@kernel.org>