Vlv2TbltDevicePkg: Remove use of PS/2 Policy Protocol

This platform does not have a PS/2 controller, so remove all
references to the PS/2 Policy Protocol.

Cc: Zailiang Sun <zailiang.sun@intel.com>
Cc: Yi Qian <yi.qian@intel.com>
Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-By: Zailiang Sun <zailiang.sun@intel.com>