msm: qseecom: Use ICE API to setup ICE for key configuration

QSEECom driver was explicitly managing ICE HW clocks/regulator
before initiating request to configure keys in ICE HW. ICE driver
has exposed an API to manage ICE HW clocks/regulator. Use ICE
driver exposed API now.

Change-Id: I3fe2c3caac6abe96d8996baf1c0bcf0a0aa828d3
Signed-off-by: Dinesh K Garg <dineshg@codeaurora.org>