merge coreboot/u-boot download logic to one script

they are fundamentally the same, in an lbmk context.

they are downloaded in the same way, and compiled in
the same way!

(Kconfig infrastructure, board-specific code, the way
submodules are used in git, etc)

~200 sloc reduction in resources/scripts

the audit begins

Signed-off-by: Leah Rowe <leah@libreboot.org>

resources/scripts/modify/coreboot/configs

@@ -44,20 +44,20 @@ main()
 modifyconf() {
 	board="$1"
 
-	if [ ! -f "resources/coreboot/${board}/board.cfg" ]; then
-		printf "\nmodify/config/coreboot: no board.cfg for: %s\n" \
+	if [ ! -f "resources/coreboot/${board}/target.cfg" ]; then
+		printf "\nmodify/config/coreboot: no target.cfg for: %s\n" \
 				"${board}"
 	fi
 
-	cbtree=""
-	. "resources/coreboot/${board}/board.cfg" # source
+	tree=""
+	. "resources/coreboot/${board}/target.cfg" # source
 
-	if [ -z ${cbtree} ]; then
+	if [ -z ${tree} ]; then
 		return 0
 	fi
-	cbdir="coreboot/${cbtree}"
+	cbdir="coreboot/${tree}"
 	if [ ! -d "${cbdir}" ]; then
-		./download coreboot ${cbtree}
+		./fetch_trees coreboot ${tree}
 	fi
 
 	for cbcfg in resources/coreboot/${board}/config/*; do

resources/scripts/modify/u-boot/configs

@@ -44,22 +44,22 @@ main()
 modifyconf()
 {
 	board="$1"
-	if [ ! -f "resources/u-boot/${board}/board.cfg" ]; then
-		printf "\nmodify/config/u-boot: no board.cfg for: %s\n" \
+	if [ ! -f "resources/u-boot/${board}/target.cfg" ]; then
+		printf "\nmodify/config/u-boot: no target.cfg for: %s\n" \
 				"${board}"
 		return 0
 	fi
 
-	ubtree="undefined"
-	. "resources/u-boot/${board}/board.cfg" # source
+	tree="undefined"
+	. "resources/u-boot/${board}/target.cfg" # source
 
-	if [ "${ubtree}" = "undefined" ]; then
+	if [ "${tree}" = "undefined" ]; then
 		return 0
 	fi
-	ubdir="u-boot/${ubtree}"
+	ubdir="u-boot/${tree}"
 
 	if [ ! -d "${ubdir}" ]; then
-		./download u-boot ${ubtree}
+		./fetch_trees u-boot ${tree}
 	fi
 
 	for ubcfg in resources/u-boot/${board}/config/*; do