drm/amdgpu/gfx7: enable cp/rlc ints after we disable clockgating

Even if we disable clockgating, we still need to make sure the
cp/rlc interrupts are enabled for powergating which might still
be enabled.
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -3797,6 +3797,9 @@ static void gfx_v7_0_enable_cgcg(struct amdgpu_device *adev, bool enable)
 		gfx_v7_0_update_rlc(adev, tmp);
 
 		data |= RLC_CGCG_CGLS_CTRL__CGCG_EN_MASK | RLC_CGCG_CGLS_CTRL__CGLS_EN_MASK;
+		if (orig != data)
+			WREG32(mmRLC_CGCG_CGLS_CTRL, data);
+
 	} else {
 		gfx_v7_0_enable_gui_idle_interrupt(adev, false);
 
@@ -3806,11 +3809,11 @@ static void gfx_v7_0_enable_cgcg(struct amdgpu_device *adev, bool enable)
 		RREG32(mmCB_CGTT_SCLK_CTRL);
 
 		data &= ~(RLC_CGCG_CGLS_CTRL__CGCG_EN_MASK | RLC_CGCG_CGLS_CTRL__CGLS_EN_MASK);
-	}
-
 		if (orig != data)
 			WREG32(mmRLC_CGCG_CGLS_CTRL, data);
 
+		gfx_v7_0_enable_gui_idle_interrupt(adev, true);
+	}
 }
 
 static void gfx_v7_0_enable_mgcg(struct amdgpu_device *adev, bool enable)