Coupled atm to wave for S2SW app

Turns on coupling from waves to atmosphere when running the full
coupled (S2SW) app. This includes moving the setting to config.base
so it is set alongside other app-specific settings.

Refs: NOAA-EMC#416

parm/config/config.base.emc.dyn

@@ -242,6 +242,7 @@ export DO_AERO="NO"
 export CCPP_SUITE="FV3_GFS_v16"
 export WAVE_CDUMP="" # When to include wave suite: gdas, gfs, or both
 export confignamevarfornems="atm" # For APP=ATM
+export cplwav2atm=".false."
 
 case "${APP}" in
   ATM)
@@ -268,6 +269,7 @@ case "${APP}" in
     export CCPP_SUITE="FV3_GFS_v16_coupled_nsstNoahmpUGWPv1"
     export WAVE_CDUMP="both"
     export confignamevarfornems="cpld_wave"
+    export cplwav2atm=".true."
     ;;
   ATMAERO)
     export DO_COUPLED="YES"

parm/config/config.fcst

@@ -49,7 +49,6 @@ export cplflx=".false."
 export cplice=".false."
 export cplgocart=".false."
 export cplwav=".false."
-export cplwav2atm=".false."
 
 # cpl changes based on APP