this is just to avoid open coding that in
icepick_d_tapenable. Cleanup only, no functional
changes.
Change-Id: Iabd20291b7bdd95957afa1c74f52171789201227
Signed-off-by: Felipe Balbi <balbi@ti.com>
Reviewed-on: http://openocd.zylin.com/2624
Tested-by: jenkins
Reviewed-by: Paul Fertser <fercerpav@gmail.com>