ARM: dts: msm: update clock_aop device node for KONA

Update the device tree node for clock_aop to specify a
functional compatible string instead of dummycc.  This
ensures that consumer requests modify clock hardware state.

Change-Id: Ia87f7633da7ff6db6da16622d84ed169793b708f
Signed-off-by: David Collins <collinsd@codeaurora.org>