AVR32 branch update for AVR32 Studio 2.6 with Atmel Software Framework included.

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1594 bbd45198-f89e-11dd-88c7-29a3b14d5316

libcpu/avr32/uc3/exception.x

@@ -71,7 +71,7 @@
   // Export symbol.
   .global _evba
   .type _evba, @function
-_evba:
+_evba:
 
         .org  0x000
         // Unrecoverable Exception.

libcpu/avr32/uc3/serial.c

@@ -19,7 +19,6 @@
 #include "serial.h"
 #include "compiler.h"
 #include "usart.h"
-#include "pdca.h"
 
 struct rt_device _rt_usart_device;
 struct avr32_serial_int_rx _rt_usart_rx;