x86: merge extern function definitions

move extern function definitions that are the same between smp_{32,64}.h
to smp.h

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/include/asm-x86/smp.h b/include/asm-x86/smp.h
index f250d1c..ad7b99d 100644
--- a/include/asm-x86/smp.h
+++ b/include/asm-x86/smp.h
@@ -8,5 +8,8 @@
 # include "smp_64.h"
 #endif
 
+extern void smp_alloc_memory(void);
+extern void lock_ipi_call_lock(void);
+extern void unlock_ipi_call_lock(void);
 #endif /* __ASSEMBLY__ */
 #endif