bsp/beatnik: More verbose fatal extension

c/src/lib/libbsp/powerpc/beatnik/startup/bspclean.c

@@ -8,6 +8,12 @@ void bsp_fatal_extension(
   rtems_fatal_code error
 )
 {
+  printk("fatal source: %s\n", rtems_fatal_source_text(source));
+
+  if (source == RTEMS_FATAL_SOURCE_EXCEPTION) {
+    rtems_exception_frame_print((const rtems_exception_frame *) error);
+  }
+
   /* We can't go back to MotLoad since we blew it's memory area
    * and vectors. Just pull the reset line...
    */