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/w49f002u.c b/w49f002u.c
index d12bc72..87ce000 100644
--- a/w49f002u.c
+++ b/w49f002u.c
@@ -36,8 +36,8 @@
 	for (i = 0; i < total_size / page_size; i++) {
 		printf("%04d at address: 0x%08x ", i, i * page_size);
 		/* Byte-wise writing of 'page_size' bytes. */
-		write_sector_jedec(bios, buf + i * page_size,
-				   bios + i * page_size, page_size);
+		write_sector_jedec_common(flash, buf + i * page_size,
+				   bios + i * page_size, page_size, 0xffff);
 		printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
 		fflush(stdout);
 	}