sun50iw6p1: Add new blob versions

Author: smaeul

sun50iw6p1/arisc_v0.3.48/README.txt

@@ -0,0 +1,4 @@
+This blob can be found at the following locations:
+
+http://files.pine64.org/os/sdk/A64-ver4.0/A64-BSP-4.0.tar.gz
+	tools/pack/chips/sun8iw7p1/bin/scp.bin