i386_ctp_defconfig: enable langwell_udc OTG support

i386_ctp_defconfig: enable langwell_udc OTG support

BZ: 29011

For clv, we need OTG support in langwell_udc.

Change-Id: I203609937b088381b913d15f0f3f3444779f9a42
Signed-off-by: Wu, Hao <hao.wu@intel.com>
Reviewed-on: http://android.intel.com:8080/43085
Reviewed-by: Zhuang, Jin Can <jin.can.zhuang@intel.com>
Reviewed-by: Tang, Richard <richard.tang@intel.com>
Reviewed-by: Meng, Zhe <zhe.meng@intel.com>
Tested-by: Meng, Zhe <zhe.meng@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>