um: Clean up stacktrace dump

We currently get a few stray newlines, due to the interaction
between printk() and the code here. Remove a few explicit
newline prints to neaten the output.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Richard Weinberger <richard@nod.at>

arch/um/kernel/sysrq.c

@@ -47,12 +47,10 @@ void show_stack(struct task_struct *task, unsigned long *stack,
 		if (kstack_end(stack))
 			break;
 		if (i && ((i % STACKSLOTS_PER_LINE) == 0))
-			printk("%s\n", loglvl);
+			pr_cont("\n");
 		pr_cont(" %08lx", *stack++);
 	}
-	printk("%s\n", loglvl);
 
 	printk("%sCall Trace:\n", loglvl);
 	dump_trace(current, &stackops, (void *)loglvl);
-	printk("%s\n", loglvl);
 }