Correct auto-restart of syscalls via restartblock

This would for example be poll(2)
Signed-off-by: NJesper Nilsson <jesper.nilsson@axis.com>

arch/cris/arch-v10/kernel/signal.c

@@ -537,7 +537,7 @@ void do_signal(int canrestart, struct pt_regs *regs)
 			RESTART_CRIS_SYS(regs);
 		}
 		if (regs->r10 == -ERESTART_RESTARTBLOCK) {
-			regs->r10 = __NR_restart_syscall;
+			regs->r9 = __NR_restart_syscall;
 			regs->irp -= 2;
 		}
 	}