Replace __attribute references with __attribute__

__attribute__ follows gcc's documented syntax and is generally more
common than __attribute.  This change is only asthetic and should not
affect functionality.

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
diff --git a/cpu/mpc86xx/cpu.c b/cpu/mpc86xx/cpu.c
index c41616d..653a137 100644
--- a/cpu/mpc86xx/cpu.c
+++ b/cpu/mpc86xx/cpu.c
@@ -40,7 +40,7 @@
 {
 	/* Do nothing */
 }
-void board_reset(void) __attribute((weak, alias("__board_reset")));
+void board_reset(void) __attribute__((weak, alias("__board_reset")));
 
 
 int