Backport fix from IOMMU regression introduced in 6.10

[Mario Limonciello <mario.limonciello@xxxxxxx>]

Hello,

This bug report was raised on an IOMMU regression found recently: 
https://bugzilla.kernel.org/show_bug.cgi?id=219499

This has been fixed by the following commit in v6.14-rc3:

commit ef75966abf95 ("iommu/amd: Expicitly enable CNTRL.EPHEn bit in 
resume path")

I confirmed it backports cleanly to the LTS 6.12.y kernel.  Can we 
please have it backported there and to 6.13.y?

Thanks!