[202012]: Update Silverstone BSP and platform APIs#266

Merged

celestica-gl merged 9 commits intoSONIC-DEV:202012_silverstonefrom

mudsut4ke:202012_silverstone_api_update1

Dec 24, 2021

Commits on Dec 21, 2021

[platform/cel]: update driver follow new FPGA spec
Wirut Getbamrung
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[device/celestica-silverstone]: add platform configuration files
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[device/celestica-silverstone]: add pmon control config
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[device/celestica-silverstone]: update sfputil follow new fpga driver
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[device/celestica-silverstone]: update platform api follow lastest spec
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committed

Commits on Dec 23, 2021

[device/celestica-silverstone]: add type_abbrv_name property in sfp api
Wirut Getbamrung
committed

Commits on Dec 24, 2021

[device/celestica-silverstone]: fix various failed cases on api test
Wirut Getbamrung
committed
[device/celestica-silverstone]: enable xcvrd
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[device/celestica-silverstone]: add specification_compliance property in sfp api
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committed