[SPARC64]: Fix sparse warnings in arch/sparc64/kernel/{cpu,setup}.c

We create a local header file entry.h, under arch/sparc64/kernel/,
that we can use to declare routines either defined in assembler
or only invoked from assembler.  As well as other data objects
which are private to the inner sparc64 kernel arch code.

Signed-off-by: David S. Miller <davem@davemloft.net>

include/asm-sparc64/cpudata.h

@@ -86,6 +86,8 @@ extern struct trap_per_cpu trap_block[NR_CPUS];
 extern void init_cur_cpu_trap(struct thread_info *);
 extern void setup_tba(void);
 extern int ncpus_probed;
+extern void __init cpu_probe(void);
+extern const struct seq_operations cpuinfo_op;
 
 extern unsigned long real_hard_smp_processor_id(void);