TI AM335x update clock names
Due to upstream has changed to use clock-output-names we need to update the names in our code aswell.
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/arch/arm/boot/dts/am33xx-clocks.dtsi?id=ec7aa25fa4839e05f73b17a838e46dc591df75f0
Split of https://reviews.freebsd.org/D27889
Will be described in https://wiki.freebsd.org/arm/BeagleBoneBlackMain