arc, print-fatal-signals: reduce duplicated information

After the recent generic debug info on dump_stack() and friends, arc
is printing duplicate information on debug dumps.

[ARCLinux]$ ./crash
crash/50: potentially unexpected fatal signal 11. <-- [1]
/sbin/crash, TGID 50 <-- [2]
Pid: 50, comm: crash Not tainted 3.9.0-rc4+ #132 <-- [3]
...

Remove them.

[[e-mail]: updated patch desc]
Signed-off-by: Vineet Gupta <[e-mail]>
Signed-off-by: Tejun Heo <[e-mail]>
Cc: Bjorn Helgaas <[e-mail]>
Cc: David S. Miller <[e-mail]>
Cc: Fengguang Wu <[e-mail]>
Cc: Heiko Carstens <[e-mail]>
Cc: Jesper Nilsson <[e-mail]>
Cc: Martin Schwidefsky <[e-mail]>
Cc: Mike Frysinger <[e-mail]>
Cc: Sam Ravnborg <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

arch/arc/kernel/troubleshoot.c

···
 	}
 
 done:
-	pr_info("%s, TGID %u\n", path_nm, tsk->tgid);
+	pr_info("Path: %s\n", path_nm);
 }
 EXPORT_SYMBOL(print_task_path_n_nm);
 

kernel/signal.c

···
 static void print_fatal_signal(int signr)
 {
 	struct pt_regs *regs = signal_pt_regs();
-	printk(KERN_INFO "%s/%d: potentially unexpected fatal signal %d.\n",
-		current->comm, task_pid_nr(current), signr);
+	printk(KERN_INFO "potentially unexpected fatal signal %d.\n", signr);
 
 #if defined(__i386__) && !defined(__arch_um__)
 	printk(KERN_INFO "code at %08lx: ", regs->ip);