Add support for AT45DB321C

It seems like this model is one-of-a-kind... it shares some properties
with the older versions of the AT45DB series as well as with new ones.

Corresponding to flashrom svn r1724.

Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
Acked-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
diff --git a/chipdrivers.h b/chipdrivers.h
index e669f00..d82ba80 100644
--- a/chipdrivers.h
+++ b/chipdrivers.h
@@ -115,6 +115,7 @@
 int spi_prettyprint_status_register_at45db(struct flashctx *flash);
 int spi_disable_blockprotect_at45db(struct flashctx *flash);
 int spi_read_at45db(struct flashctx *flash, uint8_t *buf, unsigned int start, unsigned int len);
+int spi_read_at45db_e8(struct flashctx *flash, uint8_t *buf, unsigned int start, unsigned int len);
 int spi_write_at45db(struct flashctx *flash, uint8_t *buf, unsigned int start, unsigned int len);
 int spi_erase_at45db_page(struct flashctx *flash, unsigned int addr, unsigned int blocklen);
 int spi_erase_at45db_block(struct flashctx *flash, unsigned int addr, unsigned int blocklen);