ARC: SMP: fix typo and use "come up" instead of "comeup"

When a secondary CPU fails to come up, there is a missing space in the
log:

	Timeout: CPU1 FAILED to comeup !!!

Fix it.
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

arch/arc/kernel/smp.c

@@ -226,7 +226,7 @@ int __cpu_up(unsigned int cpu, struct task_struct *idle)
 	}
 
 	if (!cpu_online(cpu)) {
-		pr_info("Timeout: CPU%u FAILED to comeup !!!\n", cpu);
+		pr_info("Timeout: CPU%u FAILED to come up !!!\n", cpu);
 		return -1;
 	}