drm/amdgpu: fix a warning in amdgpu_ras.c (v2)

drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c: In function ‘amdgpu_ras_fs_init’:
drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c:1284:2: warning: ignoring return value of ‘sysfs_create_group’, declared with attribute warn_unused_result [-Wunused-result]
 1284 |  sysfs_create_group(&adev->dev->kobj, &group);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

v2: just print an error for sysfs group creation failure

Acked-by: Nirmoy Das <nirmoy.das@amd.com>
Reviewed-by: Luben Tuikov <luben.tuikov@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -1266,6 +1266,7 @@ static int amdgpu_ras_fs_init(struct amdgpu_device *adev)
 		NULL,
 		NULL,
 	};
+	int r;
 
 	/* add features entry */
 	con->features_attr = dev_attr_features;
@@ -1281,7 +1282,9 @@ static int amdgpu_ras_fs_init(struct amdgpu_device *adev)
 		sysfs_bin_attr_init(bin_attrs[0]);
 	}
 
-	sysfs_create_group(&adev->dev->kobj, &group);
+	r = sysfs_create_group(&adev->dev->kobj, &group);
+	if (r)
+		dev_err(adev->dev, "Failed to create RAS sysfs group!");
 
 	return 0;
 }