msm: mink: keep clocks enabled for duration of invoke call

Currently, smcinvoke enables clocks for duration of scm_call. However,
if that call initiates a listener based on qseecom, it could be a
problem. So we need to keep clocks until qseecom listeners are also
done.

Change-Id: Ib000bf0ba11d95b21fc1af8f44c33a9d0c339bac
Signed-off-by: Dinesh K Garg <dineshg@codeaurora.org>