[Architecture] Update fabric key for region syntax
<fabric_key>
+ <region id="0">
<key id="0" name="sb_2__2_" value="0" alias="sb_2__2_"/>
<key id="1" name="grid_clb" value="3" alias="grid_clb_2__2_"/>
<key id="2" name="sb_0__1_" value="0" alias="sb_0__1_"/>
<key id="30" name="cbx_1__1_" value="0" alias="cbx_1__1_"/>
<key id="31" name="grid_io_top" value="0" alias="grid_io_top_1__3_"/>
<key id="32" name="grid_io_left" value="1" alias="grid_io_left_0__2_"/>
+ </region>
</fabric_key>
