flashchips: Add W25Q256JW_DTR

W25Q256JW currently has two variants, the W25Q256JW with device
ID 0x6019 added in commit be4682d and the W25Q256JW_DTR (aka
W25Q256JW-IM) with device ID 0x8019 added by this patch.

Winbond W25Q256-series chips have a few device IDs:
0x4019: W25Q256FV
0x6019: W25Q256JW
0x7019: W25Q256JV
0x8019: W25Q256JW_DTR

Hence we need to be more specific with naming than usual to avoid a
false positive with wildcards.

Change-Id: I50a6de2c915f9201c458378fcc49130ead73d8c4
Signed-off-by: David Hendricks <david.hendricks@gmail.com>
Original-Reviewed-on: https://review.coreboot.org/c/flashrom/+/42386
Original-Reviewed-by: Simon Buhrow
Original-Reviewed-by: Angel Pons <th3fanbus@gmail.com>
diff --git a/flashchips.h b/flashchips.h
index 4ae6c07..5b7937f 100644
--- a/flashchips.h
+++ b/flashchips.h
@@ -948,6 +948,7 @@
 #define WINBOND_NEX_W25Q256JV_M	0x7019	/* W25Q256JV_M (QE=0) */
 #define WINBOND_NEX_W25Q64JW	0x8017
 #define WINBOND_NEX_W25Q128_DTR	0x8018	/* W25Q128JW_DTR */
+#define WINBOND_NEX_W25Q256_DTR	0x8019	/* W25Q256JW_DTR aka W25Q256256JW-IM */
 
 #define WINBOND_ID		0xDA	/* Winbond */
 #define WINBOND_W19B160BB	0x49