[SPARC64]: Kill PROM locked TLB entry preservation code.

It is totally unnecessary complexity.  After we take over
the trap table, we handle all PROM tlb misses fully.

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

arch/sparc64/kernel/smp.c

@@ -116,14 +116,10 @@ static void smp_setup_percpu_timer(void);
 
 static volatile unsigned long callin_flag = 0;
 
-extern void inherit_locked_prom_mappings(int save_p);
-
 void __init smp_callin(void)
 {
 	int cpuid = hard_smp_processor_id();
 
-	inherit_locked_prom_mappings(0);
-
 	__local_per_cpu_offset = __per_cpu_offset(cpuid);
 
 	__flush_tlb_all();