Check for invalid E500 option combinations

[David Edelsohn]

	* config.gcc (powerpc-*-eabispe*, powerpc-*-eabisimaltivec*,
	powerpc-*-eabisim*, powerpc-*-eabialtivec*, powerpc-*-eabi*,
	powerpc-*-rtems*, powerpc-wrs-vxworks, powerpc-wrs-vxworksae,
	powerpcle-*-eabisim*, powerpcle-*-eabi*): Add rs6000/e500.h to
	tm_file.
	* config/rs6000/e500.h: New.
	* config/rs6000/eabi.h (TARGET_SPE_ABI, TARGET_SPE, TARGET_E500,
	TARGET_ISEL, TARGET_FPRS, TARGET_E500_SINGLE, TARGET_E500_DOUBLE):
	Remove.
	* config/rs6000/linuxspe.h (TARGET_SPE_ABI, TARGET_SPE,
	TARGET_E500, TARGET_ISEL, TARGET_FPRS, TARGET_E500_SINGLE,
	TARGET_E500_DOUBLE): Remove.
	* config/rs6000/vxworks.h (TARGET_SPE_ABI, TARGET_SPE,
	TARGET_E500, TARGET_ISEL, TARGET_FPRS): Remove.
	* config/rs6000/rs6000.h (CHECK_E500_OPTIONS): Define.
	* config/rs6000/rs6000.c (rs6000_override_options): Use
	CHECK_E500_OPTIONS.

Okay.

Thanks, David