clocksource/drivers/moxart: Replace panic by pr_err

The clksrc-of code is supposed to catch the return code and fail gracefully.

Don't panic on error, but print the error and exit with a relevant error
code.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Joel Stanley <joel@jms.id.au>

drivers/clocksource/moxart_timer.c

@@ -184,8 +184,10 @@ static int __init moxart_timer_init(struct device_node *node)
 	} else if (of_device_is_compatible(node, "aspeed,ast2400-timer")) {
 		timer->t1_enable_val = ASPEED_TIMER1_ENABLE;
 		timer->t1_disable_val = ASPEED_TIMER1_DISABLE;
-	} else
-		panic("%s: unknown platform\n", node->full_name);
+	} else {
+		pr_err("%s: unknown platform\n", node->full_name);
+		return -EINVAL;
+	}
 
 	timer->count_per_tick = DIV_ROUND_CLOSEST(pclk, HZ);