ARM: dts: omap4-panda: Update the twl6040 gpio to macro definition

Update the dt property ti,audpwron-gpio to use the
gpio macro definition for GPIO_ACTIVE_HIGH.

Signed-off-by: Dan Murphy <dmurphy@ti.com>
Reviewed-by: Florian Vaussard <florian.vaussard@epfl.ch>
Signed-off-by: Benoit Cousson <benoit.cousson@linaro.org>