HID: debug: Change to use DEFINE_SHOW_ATTRIBUTE macro

Use DEFINE_SHOW_ATTRIBUTE macro to simplify the code.
Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

drivers/hid/hid-debug.c

@@ -1072,11 +1072,6 @@ static int hid_debug_rdesc_show(struct seq_file *f, void *p)
 	return 0;
 }
 
-static int hid_debug_rdesc_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, hid_debug_rdesc_show, inode->i_private);
-}
-
 static int hid_debug_events_open(struct inode *inode, struct file *file)
 {
 	int err = 0;
@@ -1211,12 +1206,7 @@ static int hid_debug_events_release(struct inode *inode, struct file *file)
 	return 0;
 }
 
-static const struct file_operations hid_debug_rdesc_fops = {
-	.open           = hid_debug_rdesc_open,
-	.read           = seq_read,
-	.llseek         = seq_lseek,
-	.release        = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(hid_debug_rdesc);
 
 static const struct file_operations hid_debug_events_fops = {
 	.owner =        THIS_MODULE,