sparc: Use vsprintf extention %pf with builtin_return_address

Emit the function name not the address when possible.

builtin_return_address() gives an address.  When building
a kernel with CONFIG_KALLSYMS, emit the actual function
name not the address.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

arch/sparc/mm/srmmu.c

@@ -705,7 +705,7 @@ static void swift_update_mmu_cache(struct vm_area_struct * vma, unsigned long ad
 		val = srmmu_hwprobe(address);
 		if (val != 0 && pte_val(*ptep) != val) {
 			printk("swift_update_mmu_cache: "
-			    "addr %lx put %08x probed %08x from %p\n",
+			    "addr %lx put %08x probed %08x from %pf\n",
 			    address, pte_val(*ptep), val,
 			    __builtin_return_address(0));
 			srmmu_flush_whole_tlb();