Gentoo-Sources: Experimental – ACPI: processor idle: Practically limit “Dummy wait” workaround to old Intel systems

I added the patch indicated above to gentoo-sources behind the ‘experimental’ flag, for now. This is to remove a 20 year old workaround for newer AMD processors. I expect this to propagate to lower kernels via upstream directly. This will be in gentoo-sources-5.19.12 (USE=experimental)