clk: qcom: Add support for debugfs for MSMfalcon

The debugfs measure would be required to be supported for clocks whose
frequency could be measured using the ring oscillator. Add the debug mux
sel indexes for all the clocks supporting measure.

Change-Id: I0a28b320aa910d27987162dfcbe4e43aeca341fa
Signed-off-by: Taniya Das <tdas@codeaurora.org>