Generify jedec functions by introducing an address mask

The patch converts jedec functions into mask-based generics which can
be used for many chip provided the only changes are the addresses are
converted from 0x5555/0x2AAA to 0x555/0x2AA or similar.

The patch mostly changes jedec.c, but a few other files are changed
because they use the jedec functions within their own functions.

The patch also adds a copyright line to flashchips.c because of my
recent work in converting AMD and Atmel chips to use struct erase_block.

Corresponding to flashrom svn r828.

Signed-off-by: Sean Nelson <audiohacked@gmail.com>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
diff --git a/flashchips.c b/flashchips.c
index 59f9139..50a1226 100644
--- a/flashchips.c
+++ b/flashchips.c
@@ -5,6 +5,7 @@
  * Copyright (C) 2004 Tyan Corp
  * Copyright (C) 2005-2008 coresystems GmbH <stepan@openbios.org>
  * Copyright (C) 2006-2009 Carl-Daniel Hailfinger
+ * Copyright (C) 2009 Sean Nelson <audiohacked@gmail.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by