sim: bfin: fix typo in bf52x ports

These should be using the BF52x set of ports, not BF51x.
diff --git a/sim/bfin/machs.c b/sim/bfin/machs.c
index 7efd1fd..92ce85a 100644
--- a/sim/bfin/machs.c
+++ b/sim/bfin/machs.c
@@ -497,12 +497,12 @@
   SIC (1, 21, "bfin_usb",          "int1"),
   SIC (1, 22, "bfin_usb",          "int2"),
 };
-#define bf522_port bf51x_port
-#define bf523_port bf51x_port
-#define bf524_port bf51x_port
-#define bf525_port bf51x_port
-#define bf526_port bf51x_port
-#define bf527_port bf51x_port
+#define bf522_port bf52x_port
+#define bf523_port bf52x_port
+#define bf524_port bf52x_port
+#define bf525_port bf52x_port
+#define bf526_port bf52x_port
+#define bf527_port bf52x_port
 
 #define bf531_chipid 0x27a5
 #define bf532_chipid bf531_chipid