ARM: dts: msm: Avoid preparing L3 clock from devfreq for SDM845

L3 clocks are prepared and enabled by default by the clock driver. No need
to prepare it again at the devfreq driver level.

Signed-off-by: Saravana Kannan <skannan@codeaurora.org>
Change-Id: I3b6bf83e73618e0fd1795dd7d50a2d73bfeff4fe