ARM: 9162/1: amba: Kill sysfs attribute file of irq

As Rob said[1], there doesn't seem to be any users about the sysfs
attribute file of irq[0] and irq[1]. And we don't need to include
<asm/irq.h> as NO_IRQ has gone. Let's kill both of them.

[1] https://lkml.org/lkml/2021/8/25/461Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>

drivers/amba/bus.c

@@ -21,8 +21,6 @@
 #include <linux/reset.h>
 #include <linux/of_irq.h>
 
-#include <asm/irq.h>
-
 #define to_amba_driver(d)	container_of(d, struct amba_driver, drv)
 
 /* called on periphid match and class 0x9 coresight device. */
@@ -136,8 +134,6 @@ static ssize_t name##_show(struct device *_dev,				\
 static DEVICE_ATTR_RO(name)
 
 amba_attr_func(id, "%08x\n", dev->periphid);
-amba_attr_func(irq0, "%u\n", dev->irq[0]);
-amba_attr_func(irq1, "%u\n", dev->irq[1]);
 amba_attr_func(resource, "\t%016llx\t%016llx\t%016lx\n",
 	 (unsigned long long)dev->res.start, (unsigned long long)dev->res.end,
 	 dev->res.flags);
@@ -488,20 +484,9 @@ static int amba_device_try_add(struct amba_device *dev, struct resource *parent)
 
  skip_probe:
 	ret = device_add(&dev->dev);
-	if (ret)
-		goto err_release;
-
-	if (dev->irq[0])
-		ret = device_create_file(&dev->dev, &dev_attr_irq0);
-	if (ret == 0 && dev->irq[1])
-		ret = device_create_file(&dev->dev, &dev_attr_irq1);
-	if (ret == 0)
-		return ret;
-
-	device_unregister(&dev->dev);
-
  err_release:
-	release_resource(&dev->res);
+	if (ret)
+		release_resource(&dev->res);
  err_out:
 	return ret;