[PR72741] For all Fortran OpenACC 'routine' directive variants check for multiple clauses specifying the level of parallelism

	gcc/fortran/
	PR fortran/72741
	* gfortran.h (enum oacc_routine_lop): Add OACC_ROUTINE_LOP_ERROR.
	* openmp.c (gfc_oacc_routine_lop, gfc_match_oacc_routine): Use it.
	* trans-decl.c (add_attributes_to_decl): Likewise.
	gcc/testsuite/
	PR fortran/72741
	* gfortran.dg/goacc/routine-multiple-lop-clauses-1.f90: New file.

Co-Authored-By: Cesar Philippidis <cesar@codesourcery.com>

From-SVN: r269286