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/pm49fl00x.c b/pm49fl00x.c
index 27a1163..424b0ed 100644
--- a/pm49fl00x.c
+++ b/pm49fl00x.c
@@ -101,8 +101,8 @@
 
 		/* write to the sector */
 		printf("%04d at address: 0x%08x", i, i * page_size);
-		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");
 		fflush(stdout);
 	}