arm: tegra: hawkeye: make vrr platform specific

arm: tegra: hawkeye: make vrr platform specific

Make vrr platform specific instead of panel specific.
Enable for Hawkeye only for now.

Change-Id: Ia60e710c16d004b1705c0392d833fe3ca693c7cd
Signed-off-by: Daniel Solomon <daniels@nvidia.com>
Reviewed-on: http://git-master/r/729884
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
(cherry picked from commit 541ae5a84875ac741d3f1429ab72d4a02854c5a8)
Reviewed-on: http://git-master/r/751042
Reviewed-by: Mitch Luban <mluban@nvidia.com>
Tested-by: Mitch Luban <mluban@nvidia.com>