usb: dwc3: debugfs: Re-use DEFINE_SHOW_ATTRIBUTE() macro

[Andy Shevchenko <andriy.shevchenko@linux.intel.com>]

On Thu, 2018-02-15 at 13:16 +0200, Felipe Balbi wrote:
> ...instead of open coding file operations followed by custom ->open()
> callbacks per each attribute.
> 

Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

Though one comment below.

> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

>  static void dwc3_debugfs_create_endpoint_file(struct dwc3_ep *dep,
> +		struct dentry *parent, const char *const name,
> +		const struct file_operations *const fops)
>  {
> +	(void) debugfs_create_file(name, S_IRUGO, parent, dep, fops);
>  }

At this point why do you need one line function anymore?

> +		dwc3_debugfs_create_endpoint_file(dep, parent,
> +				name, fops);