ARM: dts: set up trigger type for edt-ft5x06 interrupts

Now that the driver respects IRQ trigger settings from device tree, let's
fix them up in individual DTSes (note that the driver is still compatible
with older DTSes).

Acked-by: Felipe Balbi <balbi@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Acked-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>