drm/i915/guc: Print error name on CTB send failure

Instead of plain error value (%d) print more user friendly error
name (%pe).
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210926184545.1407-4-michal.wajdeczko@intel.com

drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c

@@ -781,8 +781,8 @@ int intel_guc_ct_send(struct intel_guc_ct *ct, const u32 *action, u32 len,
 
 	ret = ct_send(ct, action, len, response_buf, response_buf_size, &status);
 	if (unlikely(ret < 0)) {
-		CT_ERROR(ct, "Sending action %#x failed (err=%d status=%#X)\n",
-			 action[0], ret, status);
+		CT_ERROR(ct, "Sending action %#x failed (%pe) status=%#X\n",
+			 action[0], ERR_PTR(ret), status);
 	} else if (unlikely(ret)) {
 		CT_DEBUG(ct, "send action %#x returned %d (%#x)\n",
 			 action[0], ret, ret);