EAMxx: fix bad usage of macro for IOP remapper

SCREAM_MPI_ON_DEVICE is *always* defined

Author: bartgol

components/eamxx/src/share/grid/remap/iop_remapper.cpp

@@ -123,7 +123,7 @@ void IOPRemapper::remap_fwd_impl ()
   for (int i=0; i<m_num_fields; ++i) {
     auto& f = m_single_col_fields[i];
     int col_size = f.get_header().get_identifier().get_layout().size();
-#ifdef SCREAM_MPI_ON_DEVICE
+#if SCREAM_MPI_ON_DEVICE
     m_comm.broadcast(f.get_internal_view_data<Real>(),col_size,root_id);
 #else
     if (iam_root) {

components/eamxx/src/share/tests/iop_remapper_tests.cpp

@@ -171,7 +171,7 @@ TEST_CASE("iop_remap")
     if (comm.rank()==closest_rank) {
       col.deep_copy(src.subfield(COL,closest_lid));
     }
-#ifdef SCREAM_MPI_ON_DEVICE
+#if SCREAM_MPI_ON_DEVICE
     comm.broadcast(col.get_internal_view_data<Real>(),col_size,closest_rank);
 #else
     col.sync_to_host();