ARM: dts: msm: Add dummy clock support for RUMI on MDMFERMIUM

As RUMI uses dummy clocks,adding the dummy gcc clock
clock_gcc and disable the clock_debug node.

Change-Id: I0f4c348a7552821a143f1106140cfae93cef55a3
Signed-off-by: Venkatesh Yadav Abbarapu <vabbar@codeaurora.org>