Enabling gpu scaling driver after finalize poweron, will make gpu booting happen at initially set frequency(1GHz). Also doing platform specific init scale after enabling scaling driver. Bug 200386980 Change-Id: I1bbedbbddce9d0eb5b09e71d8e353bf06227354d Signed-off-by: seshendra Gadagottu <sgadagottu@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/1653171 GVS: Gerrit_Virtual_Submit Reviewed-by: Hayden Du <haydend@nvidia.com> Tested-by: Ken Chang <kenc@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>