adi_ip_alt.tcl: Allow to add TCL files to the fileset

TCL files can be helpful to automate certain tasks like creating timing
constraints. Add handling for them to the ad_ip_addfile function.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>

library/scripts/adi_ip_alt.tcl

@@ -151,6 +151,10 @@ proc ad_ip_addfile {pname pfile} {
     add_fileset_file $pmodule SDC PATH $pfile
     return
   }
+  if {$ptype eq ".tcl"} {
+    add_fileset_file $pmodule OTHER PATH $pfile
+    return
+  }
 }
 
 proc ad_ip_files {pname pfiles {pfunction ""}} {