flashchips: Add W25Q256.W

Nicklas Lennert wrote me via the flashrom mailing list that
he successfully ran read, write and verify cmd.

Signed-off-by: Simon Buhrow <simon.buhrow@posteo.de>
Change-Id: I3608945a38b5ed42b8b2b9b2b388cdea97141d7b
Original-Reviewed-on: https://review.coreboot.org/c/flashrom/+/40855
Original-Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Original-Reviewed-by: David Hendricks <david.hendricks@gmail.com>
Reviewed-on: https://review.coreboot.org/c/flashrom-stable/+/70934
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/flashchips.h b/flashchips.h
index e5ef390..c58595d 100644
--- a/flashchips.h
+++ b/flashchips.h
@@ -941,6 +941,7 @@
 #define WINBOND_NEX_W25Q32_W	0x6016	/* W25Q32DW; W25Q32FV in QPI mode */
 #define WINBOND_NEX_W25Q64_W	0x6017	/* W25Q64DW; W25Q64FV in QPI mode */
 #define WINBOND_NEX_W25Q128_W	0x6018	/* W25Q128FW; W25Q128FV in QPI mode */
+#define WINBOND_NEX_W25Q256_W	0x6019	/* W25Q256JW */
 #define WINBOND_NEX_W25Q128_V_M	0x7018	/* W25Q128JVSM */
 #define WINBOND_NEX_W25Q256JV_M	0x7019	/* W25Q256JV_M (QE=0) */
 #define WINBOND_NEX_W25Q64JW	0x8017