Revises documentation for the kernel clocks to align it
with the actual behavior of the unified kernel.
Revises documentation for the kernel timer object type
to provide users with a more compact and intuitive API
that supports (directly or indirectly) the capabilities
of the now defunct microkernel timer and nanokernel
timer object types.
Note: A separate commit will be used to implement the
revised timer API described here.
Change-Id: Ifa4306c76e1c3e2aab1c0b55031df4179ac2a6b9
Signed-off-by: Allan Stephens <allan.stephens@windriver.com>