x86: reduce force_mwait visibility

It's not used anywhere outside its single referencing file.
Signed-off-by: NJan Beulich <jbeulich@novell.com>
Signed-off-by: NH. Peter Anvin <hpa@zytor.com>

arch/x86/kernel/cpu/amd.c

@@ -24,8 +24,6 @@
 extern void vide(void);
 __asm__(".align 4\nvide: ret");
 
-int force_mwait __cpuinitdata;
-
 static void __cpuinit early_init_amd(struct cpuinfo_x86 *c)
 {
 	if (cpuid_eax(0x80000000) >= 0x80000007) {

arch/x86/kernel/process.c

@@ -199,6 +199,7 @@ static void poll_idle(void)
  *
  * idle=mwait overrides this decision and forces the usage of mwait.
  */
+static int __cpuinitdata force_mwait;
 
 #define MWAIT_INFO			0x05
 #define MWAIT_ECX_EXTENDED_INFO		0x01

include/asm-x86/processor.h

@@ -722,8 +722,6 @@ static inline void __sti_mwait(unsigned long eax, unsigned long ecx)
 
 extern void mwait_idle_with_hints(unsigned long eax, unsigned long ecx);
 
-extern int			force_mwait;
-
 extern void select_idle_routine(const struct cpuinfo_x86 *c);
 
 extern unsigned long		boot_option_idle_override;