3e1eb51df7
- Add macros to handle the differences in accessing these registers on arm and arm64. - Use the fdt data to detect if we are on an ARMv7 or ARMv8. - Use the virtual timer by default on arm64, we may not have access to the physical timer. Differential Revision: https://reviews.freebsd.org/D2208 Reviewed by: emaste Sponsored by: The FreeBSD Foundation