Clean up a25.c, at25.c, spi25.c

- introduce spi_prettyprint_status_register_atmel_at25_wpen()
- use spi_prettyprint_status_register_bit() where possible
- generify spi_prettyprint_status_register_bp3210 and use it in at25.c too

Corresponding to flashrom svn r1560.

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 1569bf3..0c78b0d 100644
--- a/chipdrivers.h
+++ b/chipdrivers.h
@@ -48,7 +48,7 @@
 uint8_t spi_read_status_register(struct flashctx *flash);
 int spi_write_status_register(struct flashctx *flash, int status);
 void spi_prettyprint_status_register_bit(uint8_t status, int bit);
-void spi_prettyprint_status_register_bp3210(uint8_t status, int bp);
+void spi_prettyprint_status_register_bp(uint8_t status, int bp);
 void spi_prettyprint_status_register_welwip(uint8_t status);
 int spi_prettyprint_status_register(struct flashctx *flash);
 int spi_disable_blockprotect(struct flashctx *flash);