edid: fix edid_get_timing_validate() mode_valid lookup

Add a condition to the break in the modes lookup, without this
when the first mode is not valid, then edid_get_timing_validate()
return an error instead of checking the next modes.

Fixes: 1c1ed441 ("edid: add edid_get_timing_validate() variant to filter out edid modes")
Signed-off-by: NNeil Armstrong <narmstrong@baylibre.com>

common/edid.c

@@ -202,7 +202,9 @@ int edid_get_timing_validate(u8 *buf, int buf_size,
 							 timing);
 			else
 				timing_done = true;
-			break;
+
+			if (timing_done)
+				break;
 		}
 	}
 	if (!timing_done)