net: gemini: Do not check for 0 return after calling platform_get_irq()

It is not possible for platform_get_irq() to return 0. Use the
return value from platform_get_irq().

Signed-off-by: Ruan Jinjie <ruanjinjie@huawei.com>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Link: https://lore.kernel.org/r/20230802085216.659238-1-ruanjinjie@huawei.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

Author: Ruan Jinjie

drivers/net/ethernet/cortina/gemini.c

@@ -2415,8 +2415,8 @@ static int gemini_ethernet_port_probe(struct platform_device *pdev)
 
 	/* Interrupt */
 	irq = platform_get_irq(pdev, 0);
-	if (irq <= 0)
-		return irq ? irq : -ENODEV;
+	if (irq < 0)
+		return irq;
 	port->irq = irq;
 
 	/* Clock the port */