update rtconfig.py for AT91SAM9260, when using Keil MDK compiler

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1772 bbd45198-f89e-11dd-88c7-29a3b14d5316

bsp/at91sam9260/rtconfig.py

@@ -52,7 +52,7 @@ elif PLATFORM == 'armcc':
     LINK = 'armlink'
     TARGET_EXT = 'axf'
 
-    DEVICE = ' --device DARMSS9'
+    DEVICE = ' --device DARMATS9'
     CFLAGS = DEVICE + ' --apcs=interwork --diag_suppress=870'
     AFLAGS = DEVICE
     LFLAGS = DEVICE + ' --strict --info sizes --info totals --info unused --info veneers --list rtthread-at91sam9260.map --ro-base 0x20000000 --entry Entry_Point --first Entry_Point'