Merge pull request #53838 from SNiemann15/deprecation_z13_power8

[MULTIARCH-3176] Release Notes add deprecation for z13, power8, x86v1

release_notes/ocp-4-12-release-notes.adoc

@@ -704,6 +704,22 @@ Red Hat Virtualization (RHV) will be deprecated in an upcoming release of {produ
 
 CoreDNS will stop supporting wildcard DNS queries for names under the `cluster.local` domain. These queries will resolve in {product-title} {product-version} as they do in earlier versions, but support will be removed from a future {product-title} release.
 
+[id="ocp-4-12-z13-power8-x86v1-deprecations"]
+==== Specific hardware models on `ppc64le`, `s390x`, and `x86_64` v1 CPU architectures are deprecated
+
+In {product-title} 4.12, support for {op-system} functionality is deprecated for: 
+
+* IBM POWER8 all models (ppc64le)
+* IBM POWER9 AC922 (ppc64le)
+* IBM POWER9 IC922 (ppc64le)
+* IBM POWER9 LC922 (ppc64le)
+* IBM z13 all models (s390x)
+* LinuxONE Emperor (s390x)
+* LinuxONE Rockhopper (s390x)
+* AMD64 (x86_64) v1 CPU
+
+While these hardware models remain fully supported in {product-title} 4.12, Red Hat recommends that you use later hardware models.
+
 [id="ocp-4-12-removed-features"]
 === Removed features