ARM: dts: am335x-boneblue: fix wl1835 IRQ pin

Use the correct IRQ gpio pin on the BeagleBone Blue to allow the
wl1835 wireless module to actually work.

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>
Cc: Jason Kridner <jkridner@beagleboard.org>
Cc: Drew Fustini <drew@beagleboard.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>