Merge branch 'jinboxie/atm/chemistry_output_maint-3.0' into maint-3.0 (PR #6716)

The chemistry reaction rate of r_lch4 and r_lco_h are output as 0 due to
a bug in the output of chemistry file, when no chemistry output flags are set.
The bug is fixed by modifying the if clause in the code.

Fixes #6711

[BFB]

Author: wlin7

components/eam/src/chemistry/mozart/rate_diags.F90

@@ -126,7 +126,7 @@ subroutine rate_diags_calc( rxt_rates, vmr, m, ncol, lchnk, pver, pdeldry, mbar
        rxt_rates(:ncol,:,rxt_tag_map(i)) = rxt_rates(:ncol,:,rxt_tag_map(i)) *  m(:,:)
        call outfld( rate_names(i), rxt_rates(:ncol,:,rxt_tag_map(i)), ncol, lchnk )
 
-       if ( .not. history_UCIgaschmbudget_2D .and. .not. history_UCIgaschmbudget_2D_levels) return
+       if (history_UCIgaschmbudget_2D .or. history_UCIgaschmbudget_2D_levels) then
 
        if (rate_names(i) .eq. 'r_lch4') then
           !kg/m2/sec
@@ -166,6 +166,8 @@ subroutine rate_diags_calc( rxt_rates, vmr, m, ncol, lchnk, pver, pdeldry, mbar
        endif
 
        endif
+
+       endif
     enddo
 
   end subroutine rate_diags_calc