Currently we use hardware based feature flags in Kbuild file to
enable/disable certain feature flags. In case hardware changes, then we
would also need to edit Kbuild file to enable feature flags for the next
target. Instead, use CONFIG_<FEATURE_FLAG> from defconfig files to
enable DP feature flags. This will limit the changes for hardware update
to defconfig files only.
Change-Id: Icc8aa6ad51904946f9141a0f41728ed72b1f6d2f
CRs-Fixed: 2964342