max80.qsf: restore sourcing of pins.tcl

... this got dropped for some reason ...

max80.qsf

@@ -152,4 +152,6 @@ set_global_assignment -name SDC_FILE max80.sdc
 set_global_assignment -name SYSTEMVERILOG_FILE max80.sv
 set_global_assignment -name SOURCE_FILE max80.pins
 set_global_assignment -name TCL_SCRIPT_FILE scripts/pins.tcl
+set_global_assignment -name SOURCE_TCL_SCRIPT_FILE scripts/pins.tcl
+
 set_instance_assignment -name PARTITION_HIERARCHY root_partition -to | -section_id Top