module/scmi_perf: start scmi perf module after clock initialization

Add support to start SCMI perf module after all clocks are initialized
if the clock state notification id is specified via the config data.
If the clock state notification id is null, the scmi perf module will
begin during the start stage of the framework.

Change-Id: I0f04a9f9963136bf17edebc4a121045b5e2e3281
Signed-off-by: Pranav Madhu <pranav.madhu@arm.com>