[PATCH] serial: MIPS: lantiq: use devm_iounmap instead of iounmap

[Sudip Mukherjee <sudipm.mukherjee@gmail.com>]

port->membase was allocated using devm_ioremap_nocache, so ideally
we should unmap it using devm_iounmap. but it was using iounmap.

Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
---

hi,
just a small problem here.I could not build test this as I do not have a
MIPS crosscompiler.I know i should not send without a minimum build test,
but this change should not break the build (or maybe i am wrong)..

 drivers/tty/serial/lantiq.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/tty/serial/lantiq.c b/drivers/tty/serial/lantiq.c
index 4675fe1..18c3844 100644
--- a/drivers/tty/serial/lantiq.c
+++ b/drivers/tty/serial/lantiq.c
@@ -497,8 +497,10 @@ lqasc_type(struct uart_port *port)
 static void
 lqasc_release_port(struct uart_port *port)
 {
+	struct platform_device *pdev = to_platform_device(port->dev);
+
 	if (port->flags & UPF_IOREMAP) {
-		iounmap(port->membase);
+		devm_iounmap(&pdev->dev, port->membase);
 		port->membase = NULL;
 	}
 }
-- 
1.8.1.2