Make correction to the number of agents in agent table for SCMI clock

The number of agents in the agent table of SCMI Clock is not correct which is fixed in this patch.

Signed-off-by: Md Golam Tanvir Zim mdgolamtanvir.zim@arm.com Change-Id: I0d876219f9447434e95ab55bcd00d47376abeeb9