Remove jtag_rclk from target configs

Remove jtag_rclk from target configs

Some boards might have RCLK omitted from the JTAG connector and if the
interface claims support for it, OpenOCD will end up trying to use
RCLK while it's actually impossible.

This is a "cd tcl/target; sed -i s/jtag_rclk/adapter_khz/g *" patch.

Change-Id: Iee7337107bc1457966b104389ba9db75a9c860b4
Signed-off-by: Paul Fertser <fercerpav@gmail.com>
Reviewed-on: http://openocd.zylin.com/1695
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>
Reviewed-by: Mathias Küster <kesmtp@freenet.de>