sparc: remove redundant return statements

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

arch/sparc/prom/tree_64.c

@@ -154,7 +154,6 @@ void prom_getstring(int node, const char *prop, char *user_buf, int ubuf_size)
 	len = prom_getproperty(node, prop, user_buf, ubuf_size);
 	if(len != -1) return;
 	user_buf[0] = 0;
-	return;
 }
 EXPORT_SYMBOL(prom_getstring);