Revert "Add TARGET_INIT_VENDOR_LIB for unified devices"

This reverts commit 918bc402af9e2d60fcf4470b38290c55d3c46d7f.
Revert "Revert "qcom-common: add a varient script at runtime""

This reverts commit 98ab76a0ae2e40d43ca927f3707532831c6c7ccc.