fortran: Use C_PTR for buffer_addr

It was changed to use `C_PTR` in only `mpi` in fc69c0be247.

Signed-off-by: KAWASHIMA Takahiro <t-kawashima@jp.fujitsu.com>

ompi/mpi/fortran/use-mpi-f08/mod/pmpi-f08-interfaces.F90

@@ -72,13 +72,9 @@ end interface  PMPI_Buffer_attach
 
 interface  PMPI_Buffer_detach
 subroutine PMPI_Buffer_detach_f08(buffer_addr,size,ierror)
+   USE, INTRINSIC ::  ISO_C_BINDING, ONLY : C_PTR
    implicit none
-   !DEC$ ATTRIBUTES NO_ARG_CHECK :: buffer_addr
+   TYPE(C_PTR), INTENT(OUT) ::  buffer_addr
-   !GCC$ ATTRIBUTES NO_ARG_CHECK :: buffer_addr
-   !$PRAGMA IGNORE_TKR buffer_addr
-   !DIR$ IGNORE_TKR buffer_addr
-   !IBM* IGNORE_TKR buffer_addr
-   OMPI_FORTRAN_IGNORE_TKR_TYPE OMPI_ASYNCHRONOUS :: buffer_addr
    INTEGER, INTENT(OUT) :: size
    INTEGER, OPTIONAL, INTENT(OUT) :: ierror
 end subroutine PMPI_Buffer_detach_f08