Jetson TX2/28.2.1 patches

Camera

Fix missing timestamp for vi4
 * Symptom/observe: first few green/corruption frames

patch link https://devtalk.nvidia.com/default/topic/1020202/jetson-tx1/v4l2-time-stamp-does-not-work-for-l4t-28-1-jetpack-3-1-/post/5274687/#5274687

Fix FE syncpt wait (observe first 3 green/corruption frames) patch link https://devtalk.nvidia.com/default/topic/1038067/jetson-tx2/data-error-of-csi-camera-capture-on-jetson-tx2/post/5274769/#5274769
 * Symptom/observe: can not get the timestamp by v4l2 interface

Error handling mechanism for T186 (recovery mechanism) Patch link: https://devtalk.nvidia.com/default/topic/1037809/jetson-tx2/jetpack3-2-1-tx2-csi-mipi-can-only-get-the-the-first-frame-of-image-but-tx1-works-fine-/post/5272855/#5272855
 * Symptom/observe: feature implement for T186.

Fix multiple sources per single session can't launch 4 and above sensors. patch link https://devtalk.nvidia.com/default/topic/1039183/jetson-tx2/argus-syncing-multiple-capture-sessions/post/5287248/#5287248
 * Symptom/observe: Argus - Syncing multiple source single session can't open 4 and above sensors.

Fix argus_camera launch failure with CSI-camera + USB-camera patch link https://devtalk.nvidia.com/default/topic/1037593/jetson-tx2/argus-with-imx377-and-usb-flir-boson/post/5273705/#5273705
 * Symptom/observe: CSI-cameras is able to capture with v4l2 or gstreamer, but argus_camera launching failed with USB-camera connected

Multimedia

[MMAPI]Cannot run NvVideoDecoder in loop/Memory leak in NvVideoEncoder patch link https://devtalk.nvidia.com/default/topic/1043548/jetson-tx1/-mmapi-please-merge-two-libtegrav4l2-so-that-modify-different-issues/post/5294104/#5294104

[MMAPI]Fail to decode via NvJpegdecoder patch link https://devtalk.nvidia.com/default/topic/1043325/jetson-tx2/nvjpeg-die-on-decoding-picture/post/5293469/#5293469

[GSTREAMER]Memory leak in nvcompositor patch link https://devtalk.nvidia.com/default/topic/1038242/jetson-tx2/memory-leak-issue-of-gstreamer-1-8-3-in-jetpack-3-2-1/post/5276096/#5276096

 IO 

[PIN config] DPx_AUX_CH_xx as i2c function. patch link https://devtalk.nvidia.com/default/topic/1026087/jetson-tx2/tx2-use-i2c4-dp1_aux_ch-/post/5288257/#5288257

[script for flash multiple device] patch link https://devtalk.nvidia.com/default/topic/1038136/jetson-tx2/about-flashing-multiple-tegra-devices-/post/5288276/#5288276