x86/platform/uv: Add UV5 direct references

Add new references to UV5 (and UVY class) system MMR addresses and
fields primarily caused by the expansion from 46 to 52 bits of physical
memory address.

Signed-off-by: Mike Travis <mike.travis@hpe.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Dimitri Sivanich <dimitri.sivanich@hpe.com>
Reviewed-by: Steve Wahl <steve.wahl@hpe.com>
Link: https://lkml.kernel.org/r/20201005203929.148656-6-mike.travis@hpe.com