做latch up check时加入ip vendor提供的deck option，这些option在ip的库文件夹的doc文件夹中有说明。不然会出现许多假错。
比如：


VARIABLE POWER_NAME  "MVAA_PLL" "VP" "VPTX" "VPTX0" "VPTX1" "VPTX2"

VARIABLE GROUND_NAME "agnd" "agnd0" "agnd1" "agnd2" "agndref" "agndlv"

VIRTUAL CONNECT COLON NO
VIRTUAL CONNECT NAME POWER_NAME GROUND_NAME