Use a command group 'openjtag' with subcommands instead of individual
commands with 'openjtag_' prefix.
The old commands are still available for backward compatibility but
marked as deprecated.
Change-Id: Ie1b1bf0b7c03e7703cfb074e554288384bf7b1b9
Signed-off-by: Marc Schink <dev@zapb.de>
Reviewed-on: http://openocd.zylin.com/6387
Tested-by: jenkins
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>