avr-c.c (avr_register_target_pragmas): Use C++ for-loop declaration of loop variable.

avr-c.c (avr_register_target_pragmas): Use C++ for-loop declaration of loop variable.

gcc/
	* config/avr/avr-c.c (avr_register_target_pragmas): Use C++
	for-loop declaration of loop variable.
	(avr_register_target_pragmas, avr_cpu_cpp_builtins): Same.
	* config/avr/avr.c (avr_popcount_each_byte)
	(avr_init_expanders, avr_regs_to_save, sequent_regs_live)
	(get_sequence_length, avr_prologue_setup_frame, avr_map_metric)
	(avr_expand_epilogue, avr_function_arg_advance)
	(avr_out_compare, avr_out_plus_1, avr_out_bitop, avr_out_fract)
	(avr_rotate_bytes, _reg_unused_after, avr_assemble_integer)
	(avr_adjust_reg_alloc_order, output_reload_in_const)
	(avr_conditional_register_usage, avr_find_unused_d_reg)
	(avr_map_decompose, avr_fold_builtin): Same.

From-SVN: r242672