Vlv2TbltDevicePkg: Declare PciSegmentLib in platform dsc

Vlv2TbltDevicePkg: Declare PciSegmentLib in platform dsc

PiDxeS3BootScriptLib will be updated to consume PciSegmentLib
instead of PciLib to support multiple PCI segment.
That means platforms need to add PciSegmentLib
declaration in platform dsc if the PciSegmentLib was
not declared in platform dsc before.

For platforms only have one segment,
MdePkg/Library/BasePciSegmentLibPci/BasePciSegmentLibPci.inf is recommended
to be used and declared in platform dsc for PiDxeS3BootScriptLib to have
equivalent functionality with before.

Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Amy Chan <amy.chan@intel.com>
Cc: David Wei <david.wei@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
Reviewed-by: David Wei <david.wei@intel.com>
Reviewed-by: Michael Kinney <michael.d.kinney@intel.com>