Refine various vendor ID annotations

This fixes a few vendor IDs to conform with JEDEC publication 106W
(JEP106W), adds some device IDs and provides information about
non-conforming IDs. The EON change is left to the patch adding EON
chips.

This patch should have no effect on code generation.

Corresponding to flashrom svn r170 and coreboot v2 svn r3029.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Corey Osgood <corey.osgood@gmail.com>
diff --git a/m29f400bt.c b/m29f400bt.c
index 40b219c..7d8539f 100644
--- a/m29f400bt.c
+++ b/m29f400bt.c
@@ -64,6 +64,9 @@
 	myusec_delay(10);
 
 	id1 = *(volatile uint8_t *)bios;
+	/* The data sheet says id2 is at (bios + 0x01) and id2 listed in
+	 * flash.h does not match. It should be possible to use JEDEC probe.
+	 */
 	id2 = *(volatile uint8_t *)(bios + 0x02);
 
 	*(volatile uint8_t *)(bios + 0xAAA) = 0xAA;