move the ifp7xx usb serial driver files to more specific names, to make the "usb_serial" name available for more general usb class driver use


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16484 a1c6a512-1295-4272-9138-f99709370657
diff --git a/gdb/arm-stub.c b/gdb/arm-stub.c
index 0717af4..9423fcd 100644
--- a/gdb/arm-stub.c
+++ b/gdb/arm-stub.c
@@ -19,7 +19,7 @@
 
 #include <stdbool.h>
 #include <string.h>
-#include "usb_serial.h"
+#include "ifp_usb_serial.h"
 #include "sscanf.h"
 #include "pnx0101.h"
 #include "gdb_api.h"