drm/amdgpu: remove duplicate return statement

Remove a redundant identical return statement, it has no use.

Detected by CoverityScan, CID#1454586 ("Structurally dead code")
Reviewed-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v8.c

@@ -155,7 +155,6 @@ static const struct kfd2kgd_calls kfd2kgd = {
 struct kfd2kgd_calls *amdgpu_amdkfd_gfx_8_0_get_functions(void)
 {
 	return (struct kfd2kgd_calls *)&kfd2kgd;
-	return (struct kfd2kgd_calls *)&kfd2kgd;
 }
 
 static inline struct amdgpu_device *get_amdgpu_device(struct kgd_dev *kgd)