ARM: tegra: clamp inputs on Jetson TK1

The HW-defined procedure for booting Tegra requires that
CLAMP_INPUTS_WHEN_TRISTATED be enabled before programming the pinmux.
Modify the Jetson TK1 board to do this.
Signed-off-by: NStephen Warren <swarren@nvidia.com>
Signed-off-by: NTom Warren <twarren@nvidia.com>

board/nvidia/jetson-tk1/jetson-tk1.c

@@ -16,6 +16,8 @@
  */
 void pinmux_init(void)
 {
+	pinmux_set_tristate_input_clamping();
+
 	gpio_config_table(jetson_tk1_gpio_inits,
 			  ARRAY_SIZE(jetson_tk1_gpio_inits));