Input: imx_keypad - adapt the new kpp clock name

With the new i.mx clock framework we should pass NULL as the keypad
clock name.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
diff --git a/drivers/input/keyboard/imx_keypad.c b/drivers/input/keyboard/imx_keypad.c
index 9d57945..4830615 100644
--- a/drivers/input/keyboard/imx_keypad.c
+++ b/drivers/input/keyboard/imx_keypad.c
@@ -467,7 +467,7 @@
 		goto failed_free_priv;
 	}
 
-	keypad->clk = clk_get(&pdev->dev, "kpp");
+	keypad->clk = clk_get(&pdev->dev, NULL);
 	if (IS_ERR(keypad->clk)) {
 		dev_err(&pdev->dev, "failed to get keypad clock\n");
 		error = PTR_ERR(keypad->clk);