platform: tegra: padctl: add receiver detector API

platform: tegra: padctl: add receiver detector API

Support clamp_en_early and receiver detector controls.

A copy of JC's original work at http://git-master/r/#/c/1141282/3 on
tegra_usb_pad_ctrl.c

Bug 200162414
Bug 200179626

Change-Id: I8a29f7d90bfedaaa1b2609f46f511754eaa1e71f
Signed-off-by: Mark Kuo <mkuo@nvidia.com>
Reviewed-on: http://git-master/r/1169994
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: ChihMin Cheng <ccheng@nvidia.com>
Reviewed-by: Ashutosh Jha <ajha@nvidia.com>