configs: Put IPC-related benchmarks into a single config

Signed-off-by: Mel Gorman <mgorman@suse.de>
sembench: Use larger strides to reduce completion times

Signed-off-by: Mel Gorman <mgorman@suse.de>
configs: Add workload interesting to kernel devel

Signed-off-by: Mel Gorman <mgorman@suse.de>
configs: Add mpstat to scheduler configs

Signed-off-by: Mel Gorman <mgorman@suse.de>