qseecom: enable ce1 clock when sending RPMB service response to tz

TZ need to do authentication when provisioning RPMB key on secure device,
which requires accessing crypto HW. Hence, the CE clks needs to be enabled
by qseecom prior to sending RPMB response to tz.

Change-Id: I73e3844e758ebddd57639a6d477299fe306bb538
Signed-off-by: Zhen Kong <zkong@codeaurora.org>