[IA64] kexec: declare ia64_mca_pal_base in mca.h rather than kexec.h

* Kexec adds some code to arch/ia64/kernel/smp.c which needs ia64_mca_pal_base,
  so the kexec patch (actually the kdump patch) declares this
  per-cpu variable in include/asm-ia64/kexec.h.

* ia64_mca_pal_base is defined in arch/ia64/kernel/mca.c, so it
  seems to me that it would make a lot more sense to declare it in
  include/asm-ia64/mca.h.
Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Tony Luck <tony.luck@intel.com>

include/asm-ia64/kexec.h

@@ -22,7 +22,6 @@
         } while(0)
 
 extern struct kimage *ia64_kimage;
-DECLARE_PER_CPU(u64, ia64_mca_pal_base);
 extern const unsigned int relocate_new_kernel_size;
 extern void relocate_new_kernel(unsigned long, unsigned long,
 		struct ia64_boot_param *, unsigned long);

include/asm-ia64/mca.h

@@ -156,6 +156,8 @@ struct ia64_mca_notify_die {
 	int *monarch_cpu;
 };
 
+DECLARE_PER_CPU(u64, ia64_mca_pal_base);
+
 #else	/* __ASSEMBLY__ */
 
 #define IA64_MCA_CORRECTED	0x0	/* Error has been corrected by OS_MCA */