[202012][submodule] Branch out sonic-platform-daemons submodule for 2…

…02012

- [xcvrd] refactor Y-Cable firmware information to conform with all vendors (sonic-net#171)
- [thermalctld] No need exit thermalcltd when loading invalid policy file (sonic-net#172) <--- branch point

Signed-off-by: Danny Allen <[email protected]>