arm: tegra: cardhu: add support for PM315

Add support for PM315

Bug 1171138

Change-Id: I2e5461c656c41d4172aca60525655cb780eaa17e
Original-author: Mike Thompson <mikthompson@nvidia.com>
Signed-off-by: Mike Thompson <mikthompson@nvidia.com>
Signed-off-by: Bibek Basu <bbasu@nvidia.com>
Signed-off-by: Syed Rafiuddin <srafiuddin@nvidia.com>
Reviewed-on: http://git-master/r/143506
(cherry picked from commit 4e66142b6990ca586e085aa88ae0bd6b819da0c4)
Reviewed-on: http://git-master/r/166814
GVS: Gerrit_Virtual_Submit
Reviewed-by: Matthew Pedro <mapedro@nvidia.com>