Pin constraint: Add missing pin constraint for CSI interface.

script_support/components/MIPI_CSI/IO_STUB/constraints/MIPI_CSI_INTERFACE.pdc

+set_io -port_name CSI1_PWND  \
+    -pin_name Y13            \
+    -fixed true              \
+    -DIRECTION OUTPUT
+
 
 set_io -port_name CAM_C_N  \
     -pin_name AB13         \