drivers/spi: Enable flashconsole in verstage

Enable the flashconsole driver in verstage so it can be used
with VBOOT enabled.  This was tested on a VBOOT enabled system
using flashconsole to store the boot log.

Change-Id: Icd8a82dc962ece85b9fb3d2f5654369e821922eb
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://review.coreboot.org/22855
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/drivers/spi/Makefile.inc b/src/drivers/spi/Makefile.inc
index f8cff5a..3f68541 100644
--- a/src/drivers/spi/Makefile.inc
+++ b/src/drivers/spi/Makefile.inc
@@ -9,6 +9,7 @@
 
 ifeq ($(CONFIG_CONSOLE_SPI_FLASH),y)
 bootblock-y += flashconsole.c
+verstage-y += flashconsole.c
 romstage-y += flashconsole.c
 ramstage-y += flashconsole.c
 postcar-y += flashconsole.c