microblaze: Report if only one timer is used

Kernel needs two timers because of clocksource and clockevent.
It is better to show warning message directly on early
console if available. If it isn't available kernel log buffer
contains it.

Signed-off-by: Michal Simek <monstr@monstr.eu>

arch/microblaze/kernel/timer.c

@@ -278,7 +278,7 @@ void __init time_init(void)
 	timer_num =
 		*(int *) of_get_property(timer, "xlnx,one-timer-only", NULL);
 	if (timer_num) {
-		printk(KERN_EMERG "Please enable two timers in HW\n");
+		eprintk(KERN_EMERG "Please enable two timers in HW\n");
 		BUG();
 	}