ARM: at91/dt: sama5d4: fix instance id of DBGU#22

Jamsheeth wants to merge 1 commit intolinux4sam:linux-4.1-at91linux4sam/linux-at91:linux-4.1-at91from

Jamsheeth:linux-4.1-at91-sama5d4-dbguJamsheeth/linux-at91-1:linux-4.1-at91-sama5d4-dbguCopy head branch name to clipboard