Fix for W6400 hang

[Mario Limonciello <mario.limonciello@xxxxxxx>]

Hi,

It was reported that on 5.15.y there are problems with S3 suspend root 
caused to a W6400 problem. [1]

These are fixed by this commit:

a9a1ac44074f ("drm/amd/display: Manually adjust strobe for DCN303")

Can you please bring it to 5.15.y?

Thanks,

[1] https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2000299