ANDROID: Move energy model init call into arch_topology driver

Now that we decouple the Energy Model (EM) from the cpu_scale
calculation, initialize the EM after the cpu_scale calaculation
has finished.

Change-Id: I7f0fc3bed84dddb12f06d401527df2c33097a281
Signed-off-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Git-commit: 4063b5fbcb32366851acda795e3611abdd2241b0
Git-repo: https://android.googlesource.com/kernel/common/


Signed-off-by: Puja Gupta <pujag@codeaurora.org>