clocksource/drivers/h8300_timer8: Fix wrong return value in h8300_8timer_init()

In the init function, if the call to of_iomap() fails, the return
value is ENXIO instead of -ENXIO.

Change to the right negative errno.

Fixes: 691f8f8 ("clocksource/drivers/h8300_timer8: Convert init function to return error")
Cc: Daniel Lezcano <[email protected]>
Signed-off-by: Tianjia Zhang <[email protected]>
Signed-off-by: Daniel Lezcano <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: uudiin

drivers/clocksource/h8300_timer8.c

@@ -169,7 +169,7 @@ static int __init h8300_8timer_init(struct device_node *node)
 		return PTR_ERR(clk);
 	}
 
-	ret = ENXIO;
+	ret = -ENXIO;
 	base = of_iomap(node, 0);
 	if (!base) {
 		pr_err("failed to map registers for clockevent\n");