Fix ia64 build breakage in head.S

The "cleanup console_print()" patch in commit
353f6dd2 introduced an "extern"
declaration into an assembly language file.  Remove it.
Signed-off-by: NAnirban Sinha <asinha@zeugmasystems.com>
Signed-off-by: NTony Luck <tony.luck@intel.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

arch/ia64/kernel/head.S

@@ -34,7 +34,6 @@
 #include <asm/mca_asm.h>
 #include <linux/init.h>
 #include <linux/linkage.h>
-#include "head.h"
 
 #ifdef CONFIG_HOTPLUG_CPU
 #define SAL_PSR_BITS_TO_SET				\

arch/ia64/kernel/head.h

-extern void console_print(const char *s);