flashchips: Mark GigaDevice GD25B128B/GD25Q128B as tested

Alexander reported this chip as tested using a GD25B128CPIG (same device
ID, apparently) on 2018-08-30 via the mailing list. The chip name is
updated as well.

Change-Id: I134d3816c0f02e20764ab132a01bcba9f4e93f0d
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/28810
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 d6061ca..aab0870 100644
--- a/flashchips.c
+++ b/flashchips.c
@@ -6350,7 +6350,7 @@
 
 	{
 		.vendor		= "GigaDevice",
-		.name		= "GD25Q128B",
+		.name		= "GD25B128B/GD25Q128B",
 		.bustype	= BUS_SPI,
 		.manufacture_id	= GIGADEVICE_ID,
 		.model_id	= GIGADEVICE_GD25Q128,
@@ -6358,7 +6358,7 @@
 		.page_size	= 256,
 		/* OTP: 1024B total, 256B reserved; read 0x48; write 0x42, erase 0x44 */
 		.feature_bits	= FEATURE_WRSR_WREN | FEATURE_OTP,
-		.tested		= TEST_UNTESTED,
+		.tested		= TEST_OK_PREW,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
 		.block_erasers	=