re PR bootstrap/48230 (bootstrapping gcc-4.6.0-RC-20110321 fails for lm32-rtems*)

re PR bootstrap/48230 (bootstrapping gcc-4.6.0-RC-20110321 fails for lm32-rtems*)

	PR bootstrap/48230
	PR bootstrap/50927
	PR bootstrap/52466
	PR target/46898
	* config/lm32/lm32.c (lm32_legitimate_constant_p): Remove, as incorrect.
	  (TARGET_LEGITIMATE_CONSTANT_P): Undefine, as not needed.
	* config/lm32/lm32.md (movsi_insn): Add 32-bit immediate support.
	(simple_return, *simple_return): New patterns
	* config/lm32/predicates.md (movsi_rhs_operand): Remove as obsolete.
	* configure.ac (force_sjlj_exceptions): Force sjlj exceptions for lm32.

From-SVN: r208260