When the XUA instance is offloaded to a SAMI (i.e.
cItpXuaInstOffload is true and cItpXuaInstOffloadSlot
points to SAMI line card), this object specifies
the processor number on SAMI where XUA instance is offloaded.
When the XUA instance is offloaded to a Flexwan, this object
specifies the bay number where XUA instance is offloaded.
Otherwise, when cItpXuaInstOffload is false, this object is not
defined.