mips.c (mips_frame_info): Add cprestore_size field.

mips.c (mips_frame_info): Add cprestore_size field.

	* config/mips/mips.c (mips_frame_info): Add cprestore_size field.
	(compute_frame_size): Initialize it.  Remove the .cprestore slot
	from args_size.
	(mips_output_function_prologue): Simplify accordingly.
	(mips_debugger_offset): Change the mips16 frame pointer offset from
	current_function_outgoing_args to cfun->machine->frame.args_size.
	(mips_initial_elimination_offset): Likewise.
	(mips_expand_prologue): Likewise.
	(mips_expand_epilogue): Likewise.

From-SVN: r72222