**DEPENDS ON: [[graceful reboot] Add the pre_reboot_hook script execution, add the watchdog arm before the reboot](https://github.com/sonic-net/sonic-utilities/pull/3203)**
#### Why I did it
Add support for the `graceful reboot` instead of the `sysfs power cycle` to avoid filesystem corruption
### How I did it
Rename the `platform_reboot` script to the `pre_reboot_hook`.
Remove the sysfs power cycle function, from now on the Debian reboot (`/sbin/reboot`) will be executed instead of the sysfs power cycle.
#### How to verify it
1. Start watching logs by using `show log -f` and `journalctl -p debug -f`
2. Execute the `reboot` command from the switch CLI
3. Check in logs that all systemd services terminated
#### Why I did it
Add platform_asic file to each platform folder in sonic-device-data package. The file content will be used as the ground truth of mapping from PLATFORM_STRING to switch ASIC family.
One use case of the mapping is to prevent installing a wrong image, which targets for other ASIC platforms. For example, currently we have several ONIE images naming as sonic-*.bin, it's easy to mistakenly install the wrong image. With this mapping built into image, we could fetch the ONIE platform string, and figure out which ASIC it is using, and check we are installing the correct image.
After this PR merged, each platform vendor has to add one mandatory text file `device/PLATFORM_VENDOR/PLATFORM_STRING/platform_asic`, with the content of the platform's switch ASIC family.
I will update https://github.com/Azure/SONiC/wiki/Porting-Guide after this PR is merged.
You can get a list of the ASIC platforms by `ls -b platform | cat`. Currently the options are
```
barefoot
broadcom
cavium
centec
centec-arm64
generic
innovium
marvell
marvell-arm64
marvell-armhf
mellanox
nephos
p4
vs
```
Also support
```
broadcom-dnx
```
#### How I did it
#### How to verify it
Test one image on DUT. And check the folders under `/usr/share/sonic/device`
This PR has a dependency on community change to move PCIe config files from $PLATFORM/plugin folder to $PLATFORM/ folder
- Why I did it
To support PCIed daemon on Mellanox platforms
- How I did it
Add PCIed config yaml files for all Mellanox platforms
Update pmon daemon config files for SimX platforms
The new feature system health support a platform based configuration file. Add configuration files for all Mellanox platform.
Add a configuration file for SN2700, other platform will use a soft link to it.
* [updategraph] add support to use preset config instead of default minigraph
* Fix variable case
* Remove default minigraph case
* Remove default minigraphs and add default_sku files
* [mlnx-sfpplugin] enhancement to support tranceiver sensor monitoring
* Modify the eeprom folder to make it accessably from pmon container
* implement the get_transceiver_change_event API
file change list
modified: device/mellanox/x86_64-mlnx_lssn2700-r0/plugins/sfputil.py
modified: device/mellanox/x86_64-mlnx_msn2100-r0/plugins/sfputil.py
modified: device/mellanox/x86_64-mlnx_msn2410-r0/plugins/sfputil.py
modified: device/mellanox/x86_64-mlnx_msn2700-r0/plugins/sfputil.py
modified: device/mellanox/x86_64-mlnx_msn2740-r0/plugins/sfputil.py
signed-off-by Liu Kebo kebol@mellanox.com
* remove commented code
* revise the get_transceiver_change_event implementation and remove unused function
* remove blank
* First part of skipping not used port for qos configuration
* Use active ports only to set QoS parameters for 6100
* Add a test for qos.json.j2
* Add a test for Dell S6100 buffers.json template
* Update submodulre
