x86, irq: Make UP version of irq_complete_move() an inline stub

No point for having an empty real function.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

arch/x86/include/asm/hw_irq.h

@@ -144,10 +144,11 @@ extern void clear_irq_vector(int irq, struct irq_cfg *cfg);
 extern void setup_vector_irq(int cpu);
 #ifdef CONFIG_SMP
 extern void send_cleanup_vector(struct irq_cfg *);
+extern void irq_complete_move(struct irq_cfg *cfg);
 #else
 static inline void send_cleanup_vector(struct irq_cfg *c) { }
+static inline void irq_complete_move(struct irq_cfg *c) { }
 #endif
-extern void irq_complete_move(struct irq_cfg *cfg);
 
 extern int apic_retrigger_irq(struct irq_data *data);
 extern void apic_ack_edge(struct irq_data *data);

arch/x86/kernel/apic/vector.c

@@ -452,8 +452,6 @@ void irq_force_complete_move(int irq)
 
 	__irq_complete_move(cfg, cfg->vector);
 }
-#else
-void irq_complete_move(struct irq_cfg *cfg) { }
 #endif
 
 /*