ARM: tegra: pm: remove save_se_context()

ARM: tegra: pm: remove save_se_context()

Since, T14x is deprecated, save_se_context() is dead code already.

Removing this function helps us limit context of tegra_smmu_suspend()
and tegra_smmu_resume()

Bug 200032218

Change-Id: I66e7072f2ccaf121664ba591ace449455248dc0e
Signed-off-by: Sri Krishna chowdary <schowdary@nvidia.com>
Reviewed-on: http://git-master/r/591554
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Krishna Reddy <vdumpa@nvidia.com>
Reviewed-by: Shravani Dingari <shravanid@nvidia.com>
Reviewed-by: Varun Wadekar <vwadekar@nvidia.com>