set default EPS_AGRID to be the same as NARRM for East Asia RRM

Author: tangq

driver-mct/cime_config/namelist_definition_drv.xml

@@ -1524,6 +1524,7 @@
     <values>
       <value>$EPS_AGRID</value>
       <value atm_grid="ne0np4_northamericax4v1">3.e-10</value>
+      <value atm_grid="ne0np4_eastasiax4v1">3.e-10</value>
       <value atm_grid="ne1024np4.pg2" lnd_grid="ne1024np4.pg2">1.e-10</value>
       <value atm_grid="ne120np4.pg2" lnd_grid="ne120np4.pg2">1.e-10</value>
       <value atm_grid="ne256np4.pg2" lnd_grid="ne256np4.pg2">1.e-10</value>