drm/i915/perf: improve invalid OA format debug message

A minor improvement to debugging output
Signed-off-by: Robert Bragg <robert@sixbynine.org>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170511154345.962-7-lionel.g.landwerlin@intel.comSigned-off-by: Chris Wilson <chris@chris-wilson.co.uk>

drivers/gpu/drm/i915/i915_perf.c

@@ -1902,11 +1902,13 @@ static int read_properties_unlocked(struct drm_i915_private *dev_priv,
 			break;
 		case DRM_I915_PERF_PROP_OA_FORMAT:
 			if (value == 0 || value >= I915_OA_FORMAT_MAX) {
-				DRM_DEBUG("Invalid OA report format\n");
+				DRM_DEBUG("Out-of-range OA report format %llu\n",
+					  value);
 				return -EINVAL;
 			}
 			if (!dev_priv->perf.oa.oa_formats[value].size) {
-				DRM_DEBUG("Invalid OA report format\n");
+				DRM_DEBUG("Unsupported OA report format %llu\n",
+					  value);
 				return -EINVAL;
 			}
 			props->oa_format = value;