net: qca_spi: convert to DEFINE_SHOW_ATTRIBUTE

Use DEFINE_SHOW_ATTRIBUTE macro to simplify the code.
Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Acked-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/qualcomm/qca_debug.c

@@ -126,19 +126,7 @@ qcaspi_info_show(struct seq_file *s, void *what)
 
 	return 0;
 }
-
-static int
-qcaspi_info_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, qcaspi_info_show, inode->i_private);
-}
-
-static const struct file_operations qcaspi_info_ops = {
-	.open = qcaspi_info_open,
-	.read = seq_read,
-	.llseek = seq_lseek,
-	.release = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(qcaspi_info);
 
 void
 qcaspi_init_device_debugfs(struct qcaspi *qca)
@@ -154,7 +142,7 @@ qcaspi_init_device_debugfs(struct qcaspi *qca)
 		return;
 	}
 	debugfs_create_file("info", S_IFREG | 0444, device_root, qca,
-			    &qcaspi_info_ops);
+			    &qcaspi_info_fops);
 }
 
 void