[coreboot-gerrit] Change in coreboot[master]: [WIP]arch/x86: Add function to play a sound through PC speaker

[Arthur Heymans (Code Review)]

Arthur Heymans has abandoned this change. ( https://review.coreboot.org/20379 )

Change subject: [WIP]arch/x86: Add function to play a sound through PC speaker
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Abandoned

making the function make_tone public in spkmodem.c would achieve the same...