drm/amdgpu: Fix acronym typo in glossary

The initialism of RunList Controller is RLC, not RCL
Signed-off-by: Kent Russell <kent.russell@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Documentation/gpu/amdgpu/amdgpu-glossary.rst

@@ -75,7 +75,7 @@ we have a dedicated glossary for Display Core at
     PSP
         Platform Security Processor
 
-    RCL
+    RLC
       RunList Controller
 
     SDMA