cpuidle: lpm-levels: Add ftrace logging for idle low power modes

Add ftrace events to log entry/exit of cluster and cpu low power modes.
Also, add events to log parameters passed down to secure code during
power collapse.

Change-Id: I76e2faf63a80155509d6e3e610db1daa611c0b6a
Signed-off-by: Mahesh Sivasubramanian <msivasub@codeaurora.org>