Add support for Winbond W49V002A

Corresponding to flashrom svn r53 and coreboot v2 svn r2321.
diff --git a/flash.h b/flash.h
index 3e67e18..673f8b6 100644
--- a/flash.h
+++ b/flash.h
@@ -59,6 +59,7 @@
 #define W_29C020C         0x45	/* Winbond w29c020c device code */
 #define W_39V040A         0x3D	/* Winbond w39v040a device code */
 #define W_49F002U         0x0B	/* Winbond w49F002u device code */
+#define W_49V002A         0xB0  /* Winbond W49V002A device code */
 
 #define ST_ID       	  0x20
 #define ST_M29F040B       0xE2