Block eraser conversions and support for Eon EN25B series

Convert chips to block_erasers:
ST_M25PE10
ST_M25PE20
ST_M25PE40
ST_M25PE80
ST_M25PE16
PMC_25LV010
PMC_25LV016B
PMC_25LV020
PMC_25LV040
PMC_25LV080B
PMC_25LV512
PMC_39F010
PMC_49FL002
PMC_49FL004
SANYO_LE25FW203A
SPANSION_S25FL016A

Added spi_block_erase_d7 for PMC chips.

Corresponding to flashrom svn r867.

Signed-off-by: Sean Nelson <audiohacked@gmail.com>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
diff --git a/spi.h b/spi.h
index 2fa7dcd..1b49d59 100644
--- a/spi.h
+++ b/spi.h
@@ -74,6 +74,11 @@
 #define JEDEC_BE_D8_OUTSIZE	0x04
 #define JEDEC_BE_D8_INSIZE	0x00
 
+/* Block Erase 0xd7 is supported by PMC chips. */
+#define JEDEC_BE_D7		0xd7
+#define JEDEC_BE_D7_OUTSIZE	0x04
+#define JEDEC_BE_D7_INSIZE	0x00
+
 /* Sector Erase 0x20 is supported by Macronix/SST chips. */
 #define JEDEC_SE		0x20
 #define JEDEC_SE_OUTSIZE	0x04