This files can be used by the 32-bit as well as 64-bit ARM
architectures. Move them into the dts/vendor/ti directory to
make the ISA independant.
All nodes located in the AM64x MAIN domain should have the main_
prefix. This makes it more clear where those pins are actually
located in the chip.
Signed-off-by: Daniel Schultz <d.schultz@phytec.de>