irq_remapping: move structs outside #ifdef

This is friendlier to clients of the code, who are going to prepare
vcpu_data structs unconditionally, even if CONFIG_IRQ_REMAP is not
defined.
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

arch/x86/include/asm/irq_remapping.h

@@ -33,6 +33,11 @@ enum irq_remap_cap {
 	IRQ_POSTING_CAP = 0,
 };
 
+struct vcpu_data {
+	u64 pi_desc_addr;	/* Physical address of PI Descriptor */
+	u32 vector;		/* Guest vector of the interrupt */
+};
+
 #ifdef CONFIG_IRQ_REMAP
 
 extern bool irq_remapping_cap(enum irq_remap_cap cap);
@@ -58,11 +63,6 @@ static inline struct irq_domain *arch_get_ir_parent_domain(void)
 	return x86_vector_domain;
 }
 
-struct vcpu_data {
-	u64 pi_desc_addr;	/* Physical address of PI Descriptor */
-	u32 vector;		/* Guest vector of the interrupt */
-};
-
 #else  /* CONFIG_IRQ_REMAP */
 
 static inline bool irq_remapping_cap(enum irq_remap_cap cap) { return 0; }