Support for AM29F002(N)B[BT]

Fully tested on AM29F002NBT.

Probing, reading, and erasing use the Jedec-routines, whereas writing
resort to the recent write_en29f002a(), since also these chips use a
byte wise algorithm.

Corresponding to flashrom svn r321 and coreboot v2 svn r3639.

Signed-off-by: Mats Erik Andersson <mats.andersson@gisladisker.se>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>
diff --git a/flash.h b/flash.h
index 1dcdbfb..35f7ab4 100644
--- a/flash.h
+++ b/flash.h
@@ -112,6 +112,8 @@
 #define ALLIANCE_ID		0x52	/* Alliance Semiconductor */
 
 #define AMD_ID			0x01	/* AMD */
+#define AM_29F002BT		0xB0
+#define AM_29F002BB		0x34
 #define AM_29F040B		0xA4
 #define AM_29LV040B		0x4F
 #define AM_29F016D		0xAD