amd/common: Add missing line from backport for coherency.
The line initializing the variable was missed.
Fixes: ccc4abdb ("ac/gpu_info: fix more non-coherent RB and GL2 combinations") Closes: #4691 (closed)
The line initializing the variable was missed.
Fixes: ccc4abdb ("ac/gpu_info: fix more non-coherent RB and GL2 combinations") Closes: #4691 (closed)