init.qcom.post_boot: Enable bw_hwmon for MSM8939

Modify devfreq governor from cpufreq to bw_hwmon for MSM8939.

Change-Id: I4c7f5e78b5a6f022e45bae07ee89e82086e56a5b
USB: init.qcom.usb.sh: Add 64-bit kernel target name

Default composition on MSM8916 is different from
other targets and this distinction to switch back
to default composition is made on the basis of
target name.

Because of multiple variants of 32-bit and 64-bit
kernel and userspace, the target names are
assigned different for these builds. Parse the first
seven letters in target name. These seven letters
cover for 'msm' and XXXX digits. A 64-bit build
target name msm8916_32_64k is parsed to msm8916
and msm8916_32 is parsed to msm8916.

CRs-Fixed: 674082
Change-Id: If17afce5612c2a16515a3d2b30eab381e1e92076
Merge "USB: init.qcom.usb.sh: Add 64-bit kernel target name"
Merge "init.qcom.post_boot: Enable bw_hwmon for MSM8939"
Revert "init.qcom.post_boot: Enable bw_hwmon for MSM8939"

This reverts commit df5fffb9dd3d1207acfe9e3be3dc9a5e0fa28620

Change-Id: I7916eb8d24709aeda214469d7e9420be5e2a2675
Merge "Revert "init.qcom.post_boot: Enable bw_hwmon for MSM8939""