drm/amdgpu/gfx8: KIQ is also disabled when MEC is disabled

Set the ready flag to reflect this.
Reviewed-by: NChristian König <christian.koenig@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c

@@ -4565,6 +4565,7 @@ static void gfx_v8_0_cp_compute_enable(struct amdgpu_device *adev, bool enable)
 		WREG32(mmCP_MEC_CNTL, (CP_MEC_CNTL__MEC_ME1_HALT_MASK | CP_MEC_CNTL__MEC_ME2_HALT_MASK));
 		for (i = 0; i < adev->gfx.num_compute_rings; i++)
 			adev->gfx.compute_ring[i].ready = false;
+		adev->gfx.kiq.ring.ready = false;
 	}
 	udelay(50);
 }