misc: Add build opts for GCN3 GPU ISA

Change-Id: I5f2662fe72d876b7bf816b0353aaefb85fc6c1c9
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/28130
Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Anthony Gutierrez <anthony.gutierrez@amd.com>
Tested-by: kokoro <noreply+kokoro@google.com>
1 file changed