fortran: Fix an incorrect interface name

(cherry picked from commit open-mpi/ompi@b6cb0bc)

Author: kawashima-fj

ompi/mpi/fortran/use-mpi-ignore-tkr/mpi-ignore-tkr-interfaces.h.in

@@ -5413,7 +5413,7 @@ end subroutine PMPI_Request_get_status
 end interface
 
 
-interface MPI_Get
+interface MPI_Rget
 
 subroutine MPI_Rget(origin_addr, origin_count, origin_datatype, &
                     target_rank, target_disp, target_count, &
@@ -5434,7 +5434,7 @@ end subroutine MPI_Rget
 
 end interface
 
-interface PMPI_Get
+interface PMPI_Rget
 
 subroutine PMPI_Rget(origin_addr, origin_count, origin_datatype, &
                     target_rank, target_disp, target_count, &