Fixes commit 687c2767 ("ARM: dts: Add minimal support for LogicPD
Torpedo DM3730 devkit")

This patch corrects an issue where the cd-gpios was improperly setup
using IRQ_TYPE_LEVEL_LOW instead of GPIO_ACTIVE_LOW.
Signed-off-by: Adam Ford <aford173@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>