Add ALC287 speaker fixup for Lenovo IdeaPad Slim 9i 14ITL5

[Bart Kroon]

Hello,

The speaker fixup that is used for the Yoga 7 14ITL5 also applies to 
the IdeaPad Slim 9i 14ITL5. The attached patch applies the quirk.

The attached patch is validated on my laptop.

Regards,
Bart



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