Switch to using a shared main() for all of the embedded BSPs

based on the GNU tools.  This usually involved correcting the
type of bsp_start(), bsp_cleanup(), adjusting the start code to
call the right start routine (the shared boot_card()), and then
removing code from bsp_start() which was performed in the new
boot_card()/main() path.

c/src/lib/libbsp/shared/main.c

@@ -0,0 +1,62 @@
+/*
+ *  A simple main which can be used on any embedded target.
+ *
+ *  This style of initialization insures that the C++ global 
+ *  constructors are executed after RTEMS is initialized.
+ *
+ *  Thanks to Chris Johns <cjohns@plessey.com.au> for this idea.
+ *
+ *  COPYRIGHT (c) 1989-1998.
+ *  On-Line Applications Research Corporation (OAR).
+ *  Copyright assigned to U.S. Government, 1994.
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.OARcorp.com/rtems/license.html.
+ *
+ *  $Id$
+ */
+
+#include <bsp.h>
+
+char *rtems_progname;
+
+extern void bsp_start( void );
+extern void bsp_cleanup( void );
+
+extern rtems_configuration_table  BSP_Configuration;
+extern rtems_cpu_table            Cpu_table;
+
+rtems_interrupt_level bsp_isr_level;
+
+int main(int argc, char **argv, char **environ)
+{
+
+  if ((argc > 0) && argv && argv[0])
+    rtems_progname = argv[0];
+  else
+    rtems_progname = "RTEMS";
+
+  rtems_initialize_executive_late( bsp_isr_level );
+
+  return 0;
+}
+
+void boot_card(void)
+{
+  int status;
+
+  /* the atexit hook will be before the static destructor list's entry
+     point */
+  bsp_start();
+
+  bsp_isr_level =
+    rtems_initialize_executive_early( &BSP_Configuration, &Cpu_table );
+
+  status = main(0, 0, 0);
+
+  bsp_cleanup();  
+
+  exit( status );
+}
+