drm/i915: Make the report about a bogus stolen reserved area an error

Now that we should be properly filtering out the cases when the stolen
reserved area is disabled, let's convert the debug message about a
misplaced reserved area into an error.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171102151737.23336-2-ville.syrjala@linux.intel.comReviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>

drivers/gpu/drm/i915/i915_gem_stolen.c

@@ -503,7 +503,7 @@ int i915_gem_init_stolen(struct drm_i915_private *dev_priv)
 	if (reserved_base < dev_priv->mm.stolen_base ||
 	    reserved_base + reserved_size > stolen_top) {
 		dma_addr_t reserved_top = reserved_base + reserved_size;
-		DRM_DEBUG_KMS("Stolen reserved area [%pad - %pad] outside stolen memory [%pad - %pad]\n",
+		DRM_ERROR("Stolen reserved area [%pad - %pad] outside stolen memory [%pad - %pad]\n",
 			  &reserved_base, &reserved_top,
 			  &dev_priv->mm.stolen_base, &stolen_top);
 		return 0;