ARM: dts: msm: Remove ICE specific configurations for msm8996

ICE driver is managing its clocks/regulators now and exposing an
API for callers to use. Until now, QSEECom driver was managing
ICE clocks whenever it needs to initiate a request to configure
ICE keys. Since now there is no need to manage clocks/regulator
from qseecom, removing it from qseecom node.

Change-Id: I8dc9fce468dd0d1c64af9e8a6e6bb5bb13179d72
Signed-off-by: Dinesh K Garg <dineshg@codeaurora.org>