The description of dcc sysfs files is somewhat confusing and not effective.
Rewrite it to be clear.

While at it, also use literal code block for config sysfs examples and
remove redundant examples that are obvious.
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Acked-by: Souradeep Chowdhury <quic_schowdhu@quicinc.com>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221230135030.17002-3-bagasdotme@gmail.com