firmware: qcom: tz_log: update datatype for int_count

int_count variable datatype is uint64 in tz version 2.X/3.0, and
is changed to uint32 in tz version >=4.X, so updating int_count
according to the TZ version.

Change-Id: I72e128e6ad41711fd49416faf6aebfc869187ee2
Signed-off-by: Zhen Kong <zkong@codeaurora.org>