topic: add reset functions for SWD

Add swd_init_reset and swd_add_reset.
Add adapter_assert_reset and adapter_deassert_reset, and call them instead
of JTAG reset functions.

Change-Id: Ib2551c6fbb45513e0ae0dc331cfe3ee3f922298a
Signed-off-by: Simon Qian <simonqian.openocd@gmail.com>
Reviewed-on: http://openocd.zylin.com/526
Tested-by: jenkins
Reviewed-by: Freddie Chopin <freddie.chopin@gmail.com>
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>

src/jtag/swd.h

@@ -17,6 +17,9 @@
  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  ***************************************************************************/
 
+#ifndef SWD_H
+#define SWD_H
+
 /* Bits in SWD command packets, written from host to target
  * first bit on the wire is START
  */
@@ -128,4 +131,9 @@ struct swd_driver {
 	int *(*trace)(bool swo);
 };
 
+int swd_init_reset(struct command_context *cmd_ctx);
+void swd_add_reset(int req_srst);
+
 bool transport_is_swd(void);
+
+#endif /* SWD_H */