Add better pulseaudio support for thinkpad t490 #118
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This fixes the pulseaudio profiles of the Thinkpad T490.
The laptop contains a single audio card with 5 sub-devices. Default pulseaudio only offers a single sink which can only be switched between speaker/HDMI via a manual profile change.
This configures a profile set for pulseaudio which offers multiple sinks corresponding to the speaker + 4 HDMI ports. This allows the user to play audio streams on the speaker and any of the 4 HDMI/USB-C ports at the same time.