i386_ctp_defconfig: enable HSU console for Clovertrail

i386_ctp_defconfig: enable HSU console for Clovertrail

BZ: 23157

Medfield PRx uses UART 3(mirrored from UART 1) as HSU console port.
But for Clovertrail UART 2 is used as HSU console port.
This patch changes the HSU console port to 2 accordingly for Clovertrail.

Please note that only Clovertrail VV and EV boards can use HSU console
but PRx can not. This is by hardware design and is not a software issue.

Removing jumper J3D1 from debug card 3 will switch to HSU console.

Change-Id: I9f1dfdf2493a3229a3e5878532941cd3630ec6e3
Signed-off-by: Bin Gao <bin.gao@intel.com>
Reviewed-on: http://android.intel.com:8080/34809
Reviewed-by: Du, Alek <alek.du@intel.com>
Reviewed-by: Gross, Mark <mark.gross@intel.com>
Tested-by: Wang, Zhifeng <zhifeng.wang@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>