flashchips: Mark Micron MT25QL512 as tested

As reported by `Yuta Teshima` on the mailing list.

Change-Id: I7325d42b43b71ab5fc2c7618e0577e4a7b31f01a
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/28808
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
diff --git a/flashchips.c b/flashchips.c
index 2001d8c..9085c7d 100644
--- a/flashchips.c
+++ b/flashchips.c
@@ -10233,7 +10233,7 @@
 		/* supports SFDP */
 		/* OTP: 64B total; read 0x4B, write 0x42 */
 		.feature_bits	= FEATURE_WRSR_WREN | FEATURE_OTP | FEATURE_4BA_WREN,
-		.tested		= TEST_UNTESTED,
+		.tested		= TEST_OK_PREW,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
 		.block_erasers	= {