drm/amdgpu: split gc v9_4_3 functionality from gc v9_0

To prepare for gc v9_4_3 specific feature.

v2: fix exports (Alex)
Signed-off-by: Le Ma <le.ma@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.h

@@ -24,7 +24,6 @@
 #ifndef __GFX_V9_4_3_H__
 #define __GFX_V9_4_3_H__
 
-extern const struct amdgpu_gfx_funcs gfx_v9_4_3_gfx_funcs;
-extern const struct amdgpu_rlc_funcs gfx_v9_4_3_rlc_funcs;
+extern const struct amdgpu_ip_block_version gfx_v9_4_3_ip_block;
 
 #endif /* __GFX_V9_4_3_H__ */