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)
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The line initializing the variable was missed.
Fixes: ccc4abdb ("ac/gpu_info: fix more non-coherent RB and GL2 combinations") Closes: #4691 (closed)