find7a: init: Start mpdecision after setting up governors

We were missing that small part of init.qcom.post_boot.sh

Change-Id: I6441c793d594e394cba7bfbe2dbc0e9c959da41d
find7a: init: Update power mgmt settings from CAF

msm_pm settings
default governor tuning

From kk_3.5 branch of device/qcom/common: rootdir/etc/init.qcom.post_boot.sh

Change-Id: If71c6bf5db0dfb6f36484b0419061695780d708a