download/u-boot: Remove .git folders as well

The coreboot download removes .git folders as they still contain the
removed blobs, remove those in the U-Boot version as well.

Signed-off-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>

resources/scripts/download/u-boot

@@ -305,6 +305,7 @@ download_uboot_board()
 	printf "\n\n"
 
 	if [ "${deleteblobs}" = "true" ]; then
+		rm -rf "${ubtree}"/.git* "${ubtree}"/*/.git*
 		blobslist="$(print_blobs_list_path "${board}")"
 		for blob_path in $(strip_comments "${blobslist}"); do
 		    if echo "${blob_path}" | \
@@ -345,6 +346,11 @@ if [ $# -eq 0 ] ; then
 	for board in $(list_supported_boards); do
 		download_uboot_board "${board}"
 	done
+
+	if [ "${deleteblobs}" = "true" ]; then
+		rm -rf u-boot/u-boot/ u-boot/.git*
+	fi
+
 	exit 0
 elif [ $# -eq 1 -a "$1" == "--help" ] ; then
 	usage
@@ -390,6 +396,10 @@ elif [ $# -eq 1 ] ; then
 		fi
 	done
 
+	if [ "${deleteblobs}" = "true" ]; then
+		rm -rf u-boot/u-boot/ u-boot/.git*
+	fi
+
 	printf "Error: Board '${1}' is not supported\n"
 
 	exit 1