Vlv2TbltDevicePkg/FmpDeviceLib: Implement new APIs

Implement new APIs defined in FmpDeviceLib
* RegisterFmpUninstaller()
* FmpDeviceSetContext()
* FmpDeviceGetHardwareInstance()

Cc: Zailiang Sun <zailiang.sun@intel.com>
Cc: Yi Qian <yi.qian@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Signed-off-by: Eric Jin <eric.jin@intel.com>
Reviewed-by: Zailiang Sun <zailiang.sun@intel.com>