wimax/i2400m: fix SDIO debugfs dentry name

The SDIO specific debugfs dentry was being misnamed "i2400m-usb"
instead of "i2400m-sdio".

Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
diff --git a/drivers/net/wimax/i2400m/sdio.c b/drivers/net/wimax/i2400m/sdio.c
index e8ad85c..b06d526 100644
--- a/drivers/net/wimax/i2400m/sdio.c
+++ b/drivers/net/wimax/i2400m/sdio.c
@@ -407,7 +407,7 @@
 	int result;
 	struct dentry *dentry = i2400ms->i2400m.wimax_dev.debugfs_dentry;
 
-	dentry = debugfs_create_dir("i2400m-usb", dentry);
+	dentry = debugfs_create_dir("i2400m-sdio", dentry);
 	result = PTR_ERR(dentry);
 	if (IS_ERR(dentry)) {
 		if (result == -ENODEV)