of: irq: Fix the return value for of_irq_parse_one() stub

When commit 1852ebd1 ("of: irq: make a stub for of_irq_parse_one()")
added a stub for of_irq_parse_one() it set the return value to 0. Return
value of 0 in this instance means the call succeeded and the out_irq
pointer was filled with valid data. So, fix it to return an error value.

Fixes: 1852ebd1 ("of: irq: make a stub for of_irq_parse_one()")
Acked-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Saravana Kannan <saravanak@google.com>
Link: https://lore.kernel.org/r/20210210200050.4106032-1-saravanak@google.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

include/linux/of_irq.h

@@ -60,7 +60,7 @@ u32 of_msi_map_id(struct device *dev, struct device_node *msi_np, u32 id_in);
 static inline int of_irq_parse_one(struct device_node *device, int index,
 				   struct of_phandle_args *out_irq)
 {
-	return 0;
+	return -EINVAL;
 }
 static inline int of_irq_count(struct device_node *dev)
 {