msm: clock-8974: Correct LPASS measure mux settings

The LPASS debug mux index in the GCC top level mux
and the bit to activate the debug mux output have
been updated in documentation. Update the code to
reflect this.

Change-Id: Iad40c91ddba756a0fad455b93bf0f725ff27eae6
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>