ARM: dts: msm: Remove the pll-setup flag in the CPUCC node on SDM845

The qcom,osm-pll-setup no longer needs to be set since the PLL
setup for the 3 CPU clock domains is being done outside of the
HLOS.

Change-Id: Iddf28eb535690d0c773eeff5d9afd69dbffe9659
Signed-off-by: Deepak Katragadda <dkatraga@codeaurora.org>