SPI: Add API for programmer-specific flashing.

Change-Id: I7a2f5b9ae74458b5ed6271b1c27842c61546dcd2
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/4712
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
diff --git a/src/include/spi-generic.h b/src/include/spi-generic.h
index d252c32..6cdb87a 100644
--- a/src/include/spi-generic.h
+++ b/src/include/spi-generic.h
@@ -64,6 +64,8 @@
 	unsigned int	bus;
 	unsigned int	cs;
 	unsigned int	rw;
+	int force_programmer_specific;
+	struct spi_flash * (*programmer_specific_probe) (struct spi_slave *spi);
 };
 
 /*-----------------------------------------------------------------------