x86/apic: Move ipi header into apic directory

Only used locally.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20190722105219.434738036@linutronix.de

arch/x86/kernel/apic/apic_flat_64.c

@@ -15,7 +15,8 @@
 #include <asm/jailhouse_para.h>
 #include <asm/apic_flat_64.h>
 #include <asm/apic.h>
-#include <asm/ipi.h>
+
+#include "ipi.h"
 
 static struct apic apic_physflat;
 static struct apic apic_flat;

arch/x86/kernel/apic/apic_numachip.c

@@ -18,7 +18,8 @@
 
 #include <asm/apic_flat_64.h>
 #include <asm/pgtable.h>
-#include <asm/ipi.h>
+
+#include "ipi.h"
 
 u8 numachip_system __read_mostly;
 static const struct apic apic_numachip1;

arch/x86/kernel/apic/bigsmp_32.c

@@ -4,18 +4,13 @@
  *
  * Drives the local APIC in "clustered mode".
  */
-#include <linux/threads.h>
 #include <linux/cpumask.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
 #include <linux/dmi.h>
 #include <linux/smp.h>
 
-#include <asm/apicdef.h>
-#include <asm/fixmap.h>
-#include <asm/mpspec.h>
 #include <asm/apic.h>
-#include <asm/ipi.h>
+
+#include "ipi.h"
 
 static unsigned bigsmp_get_apic_id(unsigned long x)
 {

arch/x86/kernel/apic/ipi.c

@@ -3,7 +3,8 @@
 #include <linux/cpumask.h>
 
 #include <asm/apic.h>
-#include <asm/ipi.h>
+
+#include "ipi.h"
 
 void __default_send_IPI_shortcut(unsigned int shortcut, int vector, unsigned int dest)
 {

arch/x86/kernel/apic/probe_32.c

@@ -11,7 +11,8 @@
 
 #include <asm/apic.h>
 #include <asm/acpi.h>
-#include <asm/ipi.h>
+
+#include "ipi.h"
 
 #ifdef CONFIG_HOTPLUG_CPU
 #define DEFAULT_SEND_IPI	(1)

arch/x86/kernel/apic/probe_64.c

@@ -9,7 +9,8 @@
  * James Cleverdon.
  */
 #include <asm/apic.h>
-#include <asm/ipi.h>
+
+#include "ipi.h"
 
 /*
  * Check the APIC IDs in bios_cpu_apicid and choose the APIC mode.

arch/x86/kernel/apic/x2apic_phys.c

@@ -3,9 +3,8 @@
 #include <linux/cpumask.h>
 #include <linux/acpi.h>
 
-#include <asm/ipi.h>
-
 #include "x2apic.h"
+#include "ipi.h"
 
 int x2apic_phys;