KVM: x86: SVM changes for 6.6:

 - Add support for SEV-ES DebugSwap, i.e. allow SEV-ES guests to use debug
   registers and generate/handle #DBs

 - Clean up LBR virtualization code

 - Fix a bug where KVM fails to set the target pCPU during an IRTE update

 - Fix fatal bugs in SEV-ES intrahost migration

 - Fix a bug where the recent (architecturally correct) change to reinject
   #BP and skip INT3 broke SEV guests (can't decode INT3 to skip it)