qseecom: initialize array hlos_ce_hw_instance

Initialize array hlos_ce_hw_instance in qseecom_retrieve_ce_data,
otherwise, when old db is used, qseecom.ce_drv.instance may be
assigned with an uninitialized value from this array.

Change-Id: Ia28e916c46cdd5724e709c61f88ca806900c7bfd
Signed-off-by: Zhen Kong <zkong@codeaurora.org>