ARM: dts: msm: Enable filling the OPP tables for the L3 clock on SDM845

The devfreq driver relies on the OPP tables being filled with the
L3 clock domains frequency-voltage mappings. Enable support to do
so.

Change-Id: I427cfb398361b9d2894a3cb3c91508d089fc587a
Signed-off-by: Deepak Katragadda <dkatraga@codeaurora.org>