Add support for more atmel chips

AT49F002
AT49F002N
AT49F002T
AT49F002NT

Only tested the read function on AT49F002T.
datasheet @ http://www.atmel.com/atmel/acrobat/doc1017.pdf

Corresponding to flashrom svn r163 and coreboot v2 svn r3003.

Signed-off-by: Frederico Silva <frederico.silva@gmail.com>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
diff --git a/flash.h b/flash.h
index db3e0d6..2bcdf91 100644
--- a/flash.h
+++ b/flash.h
@@ -74,6 +74,8 @@
 #define ATMEL_ID		0x1F	/* Atmel */
 #define AT_29C040A		0xA4
 #define AT_29C020		0xDA
+#define AT_49F002N		0x07	/* for AT49F002(N)  */
+#define AT_49F002NT		0x08	/* for AT49F002(N)T */
 
 #define CATALYST_ID		0x31	/* Catalyst */