drm/amdgpu/gfx7: make gfx_v7_0_rlc_stop static

Not used outside of gfx7.

Reviewed-by: Chunming Zhou <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c

···
  *
  * Halt the RLC ME (MicroEngine) (CIK).
  */
-void gfx_v7_0_rlc_stop(struct amdgpu_device *adev)
+static void gfx_v7_0_rlc_stop(struct amdgpu_device *adev)
 {
 	WREG32(mmRLC_CNTL, 0);
 

drivers/gpu/drm/amd/amdgpu/gfx_v7_0.h

···
 
 extern const struct amd_ip_funcs gfx_v7_0_ip_funcs;
 
-/* XXX these shouldn't be exported */
-void gfx_v7_0_rlc_stop(struct amdgpu_device *adev);
-
 #endif