Document the purpose of phoenix_info

README

@@ -26,5 +26,10 @@ fel:
 	th CPU. You activate FEL mode by pushing the usboot/recovery
 	button at poweron.
 
+phoenix_info:
+	gives information about a phoenix image created by the
+	phoenixcard utility and optionally extracts the embedded boot
+	code & firmware file from their hidden partitions.
+
 This software is licensed under the terms of GPLv2+ as defined by the
 Free Software Foundation, details can be read in the COPYING file.