ARM: dts: msm: Disable clock-debug for msmferrum rumi

RUMI uses dummy clocks, so we need to disable the
clock_debug for rumi once the real clocks are available.

Change-Id: Ice33289be91508194872d226a304adf7de5458dc
Signed-off-by: Janani Venkataraman <jananiv@codeaurora.org>