fix: Switch to space-separated sources.conf format

- Change from colon to space separation to avoid URL parsing issues
- Update sources.conf format: TYPE NAME URL VERSION BUILD_FUNCTION [EXTRA]
- Implement awk-based parsing for reliable field extraction
- Fix firmware package list (remove unavailable linux-firmware-marvell)

initramfs/usr/share/iproute2/rt_scopes

@@ -0,0 +1,11 @@
+#
+# reserved values
+#
+0	global
+255	nowhere
+254	host
+253	link
+#
+# pseudo-reserved
+#
+200	site