... and add those to run-coalperf.sh
It seemed before that configs with narrower sourceId are more likely to
fail because of more contention between outstanding requests, so test
more of those configs.
Currently Chipyard fails to elaborate with SBus width of 512 bits. It's
unclear if this is a problem in the coalescing unit or in Chipyard in
general. For now, only enable configs that use sbus widths up to 256
bits.
