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/w39v080fa.c b/w39v080fa.c
index 580657f..311e55b 100644
--- a/w39v080fa.c
+++ b/w39v080fa.c
@@ -182,7 +182,7 @@
 	printf("Programming: ");
 	for (i = 0; i < total_size; i += flash->page_size) {
 		printf("0x%08x\b\b\b\b\b\b\b\b\b\b", i);
-		write_sector_jedec(bios, buf + i, bios + i, flash->page_size);
+		write_sector_jedec_common(flash, buf + i, bios + i, flash->page_size, 0xffff);
 	}
 	printf("\n");