Public bug reported:

[Impact]
Microphone mute hotkey(F4) have no function on Dell Sunfire powered by the AMD 
platform  

[Fix]
Fix by backporting the commit: 26a7601471f6 ("platform/x86: dell-wmi: Add 
audio/mic mute key codes") by adding the corresponding key code for mute and 
mic mute.

[Test Case]
1. Boot up the machine of new Dell Sunfire platforms
2. Press Fn+F4 to verify the mic-mute function.
3. Make sure the mic is muted by `arecord` 

[Where problems could occur]
It only adds the key codes for the mic-mute and mute on some Dell platforms. 
The risk of regression is limited.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: linux-oem-6.17 (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: linux (Ubuntu Noble)
     Importance: Undecided
         Status: New

** Affects: linux-oem-6.17 (Ubuntu Noble)
     Importance: Undecided
         Status: In Progress

** Affects: linux (Ubuntu Resolute)
     Importance: Undecided
         Status: New

** Affects: linux-oem-6.17 (Ubuntu Resolute)
     Importance: Undecided
         Status: New

** Also affects: linux (Ubuntu Noble)
   Importance: Undecided
       Status: New

** Also affects: linux (Ubuntu Resolute)
   Importance: Undecided
       Status: New

** Also affects: linux-oem-6.17 (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: linux-oem-6.17 (Ubuntu Noble)
       Status: New => In Progress

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https://bugs.launchpad.net/bugs/2155120

Title:
  Fix audio mute function not working on some Dell AMD platforms

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