* config.gcc (mips64vr-*-elf*, mips64vrel-*-elf*): Add
	MIPS_MARCH_CONTROLS_SOFT_FLOAT=1 to $tm_defines.
	* config/mips/mips.c (MIPS_MARCH_CONTROLS_SOFT_FLOAT): Default to 0.
	(override_options): Base default setting of MASK_SOFT_FLOAT on -march
	if MIPS_MARCH_CONTROLS_SOFT_FLOAT.

From-SVN: r58488