Previously the LDS bus latency was not configurable in the GPU config scripts. As a result, the simulations would use the default value from GPU.py. This commit adds support to change this value as an input option. The option to use is "--vrf_lm_bus_latency". Change-Id: I8d8852e6d7b9d03ebec1fe8b392968f396dd3526 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/63652 Maintainer: Matthew Poremba <matthew.poremba@amd.com> Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Matt Sinclair <mattdsinclair.wisc@gmail.com>