Documentation: powerclamp: Fix numbered lists formatting

Texts in numbered lists are rendered as continous paragraph when there
should have been breaks between first line text in the beginning of list
item and the description. Fix this by adding appropriate line breaks and
indent the rest of lines to match the first line of numbered list item.

Fixes: d6d71ee4 ("PM: Introduce Intel PowerClamp Driver")
Fixes: 6bbe6f57 ("docs: thermal: convert to ReST")
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>