x86: irq.c fix style problems

Impact: cleanup

Fix:

 WARNING: Use #include <linux/smp.h> instead of <asm/smp.h>

 total: 0 errors, 1 warnings
Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/kernel/irq.c

@@ -5,10 +5,10 @@
 #include <linux/interrupt.h>
 #include <linux/kernel_stat.h>
 #include <linux/seq_file.h>
+#include <linux/smp.h>
 
 #include <asm/apic.h>
 #include <asm/io_apic.h>
-#include <asm/smp.h>
 #include <asm/irq.h>
 
 atomic_t irq_err_count;