obsolete the deprecated rtems targets

gcc/ChangeLog:

2016-02-03  Trevor Saunders  <tbsaunde+gcc@tbsaunde.org>

	* config.gcc: Mark deprecated rtems targets as obsolete.

From-SVN: r233165

gcc/ChangeLog

+2016-02-03  Trevor Saunders  <tbsaunde+gcc@tbsaunde.org>
+
+	* config.gcc: Mark deprecated rtems targets as obsolete.
+
 2016-02-04  Segher Boessenkool  <segher@kernel.crashing.org>
 
 	PR rtl-optimization/64682

gcc/config.gcc

@@ -240,6 +240,9 @@ case ${target} in
  | *-knetbsd-*				\
  | *-openbsd2*				\
  | *-openbsd3*				\
+ | avr-*rtems*				\
+ | h8300-*rtems*			\
+ | m32r-*rtems*			\
  )
     if test "x$enable_obsolete" != xyes; then
       echo "*** Configuration ${target} is obsolete." >&2