clk: qcom: debugcc-qcs405: Update CPU measure node

The CPU frequency measured 6 times the original 
frequency. Update value of mux select shift,
mask and post div for cpu frequency measure node
correctly to give the correct frequency.

Change-Id: Iee31e4820108bd1131cb6cb042fdadc2612e463a
Signed-off-by: Shefali Jain <shefjain@codeaurora.org>