staging: rtl8712: Calculate size from pointer

Calculate the size from the pointer instead of struct to adhere to kernel
coding style.
Signed-off-by: Manisha Singh <masingh.linux@gmail.com>
Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/20240828222153.68062-4-masingh.linux@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8712/rtl871x_io.c

@@ -48,7 +48,7 @@ static uint _init_intf_hdl(struct _adapter *padapter,
 	set_intf_funs = &(r8712_usb_set_intf_funs);
 	set_intf_ops = &r8712_usb_set_intf_ops;
 	init_intf_priv = &r8712_usb_init_intf_priv;
-	pintf_priv = kmalloc(sizeof(struct intf_priv), GFP_ATOMIC);
+	pintf_priv = kmalloc(sizeof(*pintf_priv), GFP_ATOMIC);
 	pintf_hdl->pintfpriv = pintf_priv;
 	if (!pintf_priv)
 		goto _init_intf_hdl_fail;