qcom: clock-gcc-8994: Add dummy clocks for the A53/57 and CCI

Low power mode and cpufreq drivers need to obtain
references to the CPU and CCI clocks. Add dummy
clocks to allow them to probe.

Change-Id: I11d4b7959b5abcf992bade9a18217fbfb51761e4
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>