xen/percpu: Drop unused xen/percpu.h includes

None of these headers use any PER_CPU() infrastructure.

xen/rwlock.h however does, and picked it up transitively via xen/spinlock.h,
so include it properly.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Roger Pau Monné <roger.pau@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>

xen/include/asm-x86/i387.h

@@ -12,7 +12,6 @@
 #define __ASM_I386_I387_H
 
 #include <xen/types.h>
-#include <xen/percpu.h>
 
 /* Byte offset of the stored word size within the FXSAVE area/portion. */
 #define FPU_WORD_SIZE_OFFSET 511

xen/include/xen/multicall.h

@@ -5,7 +5,6 @@
 #ifndef __XEN_MULTICALL_H__
 #define __XEN_MULTICALL_H__
 
-#include <xen/percpu.h>
 #ifdef CONFIG_COMPAT
 #include <compat/xen.h>
 #endif

xen/include/xen/rcupdate.h

@@ -33,7 +33,6 @@
 
 #include <xen/cache.h>
 #include <xen/spinlock.h>
-#include <xen/percpu.h>
 #include <xen/cpumask.h>
 #include <xen/preempt.h>
 

xen/include/xen/rwlock.h

@@ -1,6 +1,7 @@
 #ifndef __RWLOCK_H__
 #define __RWLOCK_H__
 
+#include <xen/percpu.h>
 #include <xen/spinlock.h>
 
 #include <asm/atomic.h>

xen/include/xen/spinlock.h

@@ -4,7 +4,6 @@
 #include <asm/system.h>
 #include <asm/spinlock.h>
 #include <asm/types.h>
-#include <xen/percpu.h>
 
 #ifndef NDEBUG
 struct lock_debug {