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

firmware/SOURCES

@@ -494,7 +494,7 @@ target/coldfire/iaudio/m5/audio-m5.c
 
 #ifdef IRIVER_IFP7XX_SERIES
 #ifdef STUB
-usb_serial.c
+ifp_usb_serial.c
 common/sscanf.c
 #endif /* STUB */
 #endif /* IRIVER_IFP7XX_SERIES */

firmware/ifp_usb_serial.c

@@ -25,7 +25,7 @@
 /* #include "config.h" */
 #include <stdlib.h>
 #include "pnx0101.h"
-#include "usb_serial.h"
+#include "ifp_usb_serial.h"
 
 #ifdef BUTTONS
 #include "kernel.h"

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"