arm: tegra: Stub pm domain defines to funcs

arm: tegra: Stub pm domain defines to funcs

Turn stub pm domain defines into functions. This prevents build
failures if the caller declares a variable just to be passed to
these functions.

Change-Id: I6dce238f3085c3e454e4bf658d87c6a2e1d388d8
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/383870
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Prashant Gaikwad <pgaikwad@nvidia.com>
Reviewed-by: Juha Tukkinen <jtukkinen@nvidia.com>