Makefile: Fix dependencies for developerbox_spi

Note: This patch was backported from the master branch and it was
modified so that it can be applied on the 1.2.x branch.

The developerbox_spi programmer depends on bitbang SPI support. Thus,
fix that.

Signed-off-by: Felix Singer <felixsinger@posteo.net>
Change-Id: Ic0fe589ffdccede0fbf6360c2bebe58a36654f10
Reviewed-on: https://review.coreboot.org/c/flashrom/+/66096
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Thomas Heijligen <src@posteo.de>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/68064
diff --git a/Makefile b/Makefile
index 52a2f95..0cea6b7 100644
--- a/Makefile
+++ b/Makefile
@@ -763,12 +763,16 @@
 ifeq ($(CONFIG_OGP_SPI), yes)
 override CONFIG_BITBANG_SPI = yes
 else
+ifeq ($(CONFIG_DEVELOPERBOX_SPI), yes)
+override CONFIG_BITBANG_SPI = yes
+else
 CONFIG_BITBANG_SPI ?= no
 endif
 endif
 endif
 endif
 endif
+endif
 
 ###############################################################################
 # Handle CONFIG_* variables that depend on others set (and verified) above.