aptenodytes, eudyptes: Set CPU type to "ZEN 2"

This kernel runs on my instances of Hetzner's CPX virtual servers.
According to Hetzner, there is a AMD Epic Gen 2 placed, which in turn
seems to be ZEN 2.

See:
- https://docs.hetzner.com/cloud/technical-details/faq#what-hardware-do-my-servers-run-on
- https://en.wikipedia.org/wiki/Epyc#Second_generation_Epyc_(Rome)

aptenodytes-config

@@ -353,7 +353,7 @@ CONFIG_ARCH_CPUIDLE_HALTPOLL=y
 # CONFIG_MSTEAMROLLER is not set
 # CONFIG_MEXCAVATOR is not set
 # CONFIG_MZEN is not set
-# CONFIG_MZEN2 is not set
+CONFIG_MZEN2=y
 # CONFIG_MZEN3 is not set
 # CONFIG_MZEN4 is not set
 # CONFIG_MZEN5 is not set
@@ -383,12 +383,12 @@ CONFIG_ARCH_CPUIDLE_HALTPOLL=y
 # CONFIG_MRAPTORLAKE is not set
 # CONFIG_MMETEORLAKE is not set
 # CONFIG_MEMERALDRAPIDS is not set
-CONFIG_GENERIC_CPU=y
+# CONFIG_GENERIC_CPU is not set
 # CONFIG_MNATIVE_INTEL is not set
 # CONFIG_MNATIVE_AMD is not set
-CONFIG_X86_64_VERSION=1
 CONFIG_X86_INTERNODE_CACHE_SHIFT=6
 CONFIG_X86_L1_CACHE_SHIFT=6
+CONFIG_X86_USE_PPRO_CHECKSUM=y
 CONFIG_X86_TSC=y
 CONFIG_X86_HAVE_PAE=y
 CONFIG_X86_CMPXCHG64=y