Fix up fv3_setup cores per node

Author: mathomp4

scripts/fv3_setup

@@ -268,15 +268,9 @@ if ( $SITE == 'NCCS' ) then
 
    if ($MODEL == 'mil') then
       # We save a couple processes for the kernel
-      set NCPUS_PER_NODE = 126
+      set NCPUS_PER_NODE = 120
    else if ($MODEL == 'cas') then
-      # NCCS currently recommends that users do not run with
-      # 48 cores per node on SCU16 due to OS issues and
-      # recommends that CPU-intensive works run with 46 or less
-      # cores. As 45 is a multiple of 3, it's the best value
-      # that doesn't waste too much
-      #set NCPUS_PER_NODE = 48
-      set NCPUS_PER_NODE = 45
+      set NCPUS_PER_NODE = 40
    endif
 
 else if ( $SITE == 'NAS' ) then