[Patch,AVR]: PR50566: Better log output with -mdeb/-mlog= [2/n]

[Georg-Johann Lay]

This is the second patch in this series.

Functions that formerly used fprintf/debug_rtx now use avr_edump and the use
sites of TARGET_ALL_DEBUG are mapped to respective flags of avr_log.

avr_log_vadump uses %b to print bool.

The patch adds outputs for the results of avr_rtx_costs and wraps the worker
function.

Ok to apply?

Johann

	PR target/50566
	* config/avr/avr-log.c (avr_log_vadump): Use %b to print bool.
	* config/avr/avr.c (avr_rtx_costs_1): New static function, renamed
	from avr_rtx_costs.
	(avr_legitimate_address_p): Use avr_edump to print log information
	filtered by avr_log.
	(extra_constraint_Q): Ditto.
	(avr_legitimize_address): Ditto.
	(avr_rtx_costs): Ditto.  Rewrite as wrapper for avr_rtx_costs_1.
	(final_prescan_insn): Use avr_log.rtx_costs as filter.

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