Add support for Winbond W49V002A

Corresponding to flashrom svn r53 and coreboot v2 svn r2321.
diff --git a/flashchips.c b/flashchips.c
index c7a2cb5..5b5928e 100644
--- a/flashchips.c
+++ b/flashchips.c
@@ -80,6 +80,8 @@
 	 probe_jedec, 	erase_chip_jedec, write_jedec,	NULL},
 	{"W49F002U", 	WINBOND_ID, 	W_49F002U,	NULL, 256, 128,
 	 probe_jedec,	erase_chip_jedec, write_49f002, NULL},
+	{"W49V002A", 	WINBOND_ID, 	W_49V002A,	NULL, 256, 128,
+	 probe_jedec,	erase_chip_jedec, write_49f002, NULL},
 	{"W39V040A", 	WINBOND_ID, 	W_39V040A,	NULL, 512, 64*1024,
 	 probe_jedec,	erase_chip_jedec, write_39sf020, NULL},
 	{"M29F040B",	ST_ID, 		ST_M29F040B,	NULL, 512, 64 * 1024,