KVM: x86: Remove VT-d mention in posted interrupt tracepoint

The kvm_pi_irte_update tracepoint is called from both SVM and VMX vendor
code, and while the "posted interrupt" naming is also adopted by SVM in
several places, VT-d specifically refers to Intel's "Virtualization
Technology for Directed I/O".

Signed-off-by: Alejandro Jimenez <alejandro.j.jimenez@oracle.com>
Link: https://lore.kernel.org/r/20240418021823.1275276-3-alejandro.j.jimenez@oracle.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

arch/x86/kvm/trace.h

@@ -1074,7 +1074,7 @@ TRACE_EVENT(kvm_smm_transition,
 );
 
 /*
- * Tracepoint for VT-d posted-interrupts.
+ * Tracepoint for VT-d posted-interrupts and AMD-Vi Guest Virtual APIC.
  */
 TRACE_EVENT(kvm_pi_irte_update,
 	TP_PROTO(unsigned int host_irq, unsigned int vcpu_id,
@@ -1100,7 +1100,7 @@ TRACE_EVENT(kvm_pi_irte_update,
 		__entry->set		= set;
 	),
 
-	TP_printk("VT-d PI is %s for irq %u, vcpu %u, gsi: 0x%x, "
+	TP_printk("PI is %s for irq %u, vcpu %u, gsi: 0x%x, "
 		  "gvec: 0x%x, pi_desc_addr: 0x%llx",
 		  __entry->set ? "enabled and being updated" : "disabled",
 		  __entry->host_irq,