msm: SSR: Cleanup style and remove useless code

Assorted cleanups and fixes:

 * A break in a switch statement should line up with the rest of
   the statements in the case.

 * queue_work() can't return one indicating the work is already
   queued if the work is dynamically allocated.

 * Remove unnecessary header includes.

 * Clean up multi-line comments.

Change-Id: Ie5c544ee34e9f4eaeb9af5ff6d4c39975238cde3
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>