Add support for AT45CS1282

This one is even more strange than the AT45DB chips. Like the AT45DB321C
it does not support any power-of-2 page sizes. There is only one asymmetrical
eraser and that uses two opcodes.

Corresponding to flashrom svn r1725.

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 d82ba80..180d36d 100644
--- a/chipdrivers.h
+++ b/chipdrivers.h
@@ -121,6 +121,7 @@
 int spi_erase_at45db_block(struct flashctx *flash, unsigned int addr, unsigned int blocklen);
 int spi_erase_at45db_sector(struct flashctx *flash, unsigned int addr, unsigned int blocklen);
 int spi_erase_at45db_chip(struct flashctx *flash, unsigned int addr, unsigned int blocklen);
+int spi_erase_at45cs_sector(struct flashctx *flash, unsigned int addr, unsigned int blocklen);
 
 /* 82802ab.c */
 uint8_t wait_82802ab(struct flashctx *flash);