[ARM] Fix PR79742 incorrect scheduler choice.

[ARM] Fix PR79742 incorrect scheduler choice.

Due to an oversight, the changes to use the new CPU generation tables
forgot to handle selecting a scheduler for a CPU other than the named
CPU target.  This meant that if, say, cortex-a12 was used, the null
scheduler was chosen rather than cortex-a17's scheduler as intended.
The fix is to correctly use the 'tune for' field when generating the
target-specific data files.

This revealed a spelling mistake in the name of the tune target in
cortex-m0.small-multiply.

	PR target/79742
	* config/arm/parsecpu.awk (gen_data): Set tuning target to 'tune for'
	entry, if present.
	* config/arm/arm-cpus.in (cortex-m0plus.small-multiply): Correct
	'tune for' CPU name.
	* config/arm/arm-cpu-data.h: Regenerated.

From-SVN: r245775