video: tegra: hpd: Add hotplug driver

video: tegra: hpd: Add hotplug driver

Generic hotplug driver to cater all
external display interfaces.

Bug 200077478
Bug 200113686

Change-Id: I2af3e02e4bd86f73d84b1d41e9855df8c6d8cf71
Signed-off-by: Animesh Kishore <ankishore@nvidia.com>
Reviewed-on: http://git-master/r/766599
(cherry picked from commit 0133d7fcdbd18b5519bb0fa96bfe24f8e23e3e5e)
Reviewed-on: http://git-master/r/781165
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Santosh Galma <galmar@nvidia.com>
Reviewed-by: Shu Zhong <shuz@nvidia.com>
Tested-by: Shu Zhong <shuz@nvidia.com>
Reviewed-by: Mitch Luban <mluban@nvidia.com>