For the 64-bit platforms, this is a nop. Currently kboot only supports
64-bit platforms, though. If we support 32-bit in the future, this will
become important.
Noticed by: rpokala
Sponsored by: Netflix
Most of the files in /sys/ and /proc/ are small with one value. Create
two routines to help us read the file and decode that value.
Sponsored by: Netflix