m32c.c (m32c_function_value_regno_p): Make static.

	* config/m32c/m32c.c (m32c_function_value_regno_p): Make static.
	(m32c_override_options): Rename to...
	(m32c_option_override): ...this. Make static.
	(TARGET_FUNCTION_VALUE_REGNO_P, TARGET_OPTION_OVERRIDE): Define.
	* config/m32c/m32c.h (OVERRIDE_OPTIONS, FUNCTION_VALUE_REGNO_P):
	Remove.
	* config/m32c/m32c-protos.h (m32c_override_options,
	m32c_function_value_regno_p): Remove.

From-SVN: r163488