KVM: Squash two CONFIG_HAVE_KVM_IRQCHIP #ifdefs into one

Squash two #idef CONFIG_HAVE_KVM_IRQCHIP regions in KVM's trace events, as
the only code outside of the #idefs depends on CONFIG_KVM_IOAPIC, and that
Kconfig only exists for x86, which unconditionally selects HAVE_KVM_IRQCHIP.

No functional change intended.

Acked-by: Kai Huang <kai.huang@intel.com>
Link: https://lore.kernel.org/r/20250611213557.294358-16-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

include/trace/events/kvm.h

@@ -82,7 +82,6 @@ TRACE_EVENT(kvm_set_irq,
 	TP_printk("gsi %u level %d source %d",
 		  __entry->gsi, __entry->level, __entry->irq_source_id)
 );
-#endif /* defined(CONFIG_HAVE_KVM_IRQCHIP) */
 
 #ifdef CONFIG_KVM_IOAPIC
 
@@ -93,8 +92,6 @@ TRACE_EVENT(kvm_set_irq,
 
 #endif /* CONFIG_KVM_IOAPIC */
 
-#if defined(CONFIG_HAVE_KVM_IRQCHIP)
-
 #ifdef kvm_irqchips
 #define kvm_ack_irq_string "irqchip %s pin %u"
 #define kvm_ack_irq_parm  __print_symbolic(__entry->irqchip, kvm_irqchips), __entry->pin