dev: add support for HSA's barrier bit kernel synchronization

dev: add support for HSA's barrier bit kernel synchronization

This commit adds support for the HSA's barrier bit version of
synchronization.  This method of synchronization is used for all
HIP benchmarks, and thus is necessary to ensure that multiple
kernels from the same queue are synchronizing properly.

Change-Id: I64f2d311a3970b71194e0555e2b932800df65e98
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/29925
Reviewed-by: Anthony Gutierrez <anthony.gutierrez@amd.com>
Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com>
Maintainer: Anthony Gutierrez <anthony.gutierrez@amd.com>
Tested-by: kokoro <noreply+kokoro@google.com>