ARM: dts: msm: Add support for dummy clock for msmtellurium

Use dummy clocks for virtio and RUMI

This will be replaced with proper definitions once the clk
structures are ready.

Change-Id: I0c2c91f8461af5d44819d4bb76f28cc45d84b64b
Signed-off-by: Arun Ks <arunks@codeaurora.org>