* [202012] Add SOC property to enable AN/LT on some platforms
Why I did it
To enable autonegotiation/link training on some Broadcom-based platforms (Arista 7060CX, 7260CX3, 7050cx3, Celestica DX010)
How I did it
Add appropriate SOC property for enabling the feature to the Broadcom config files of appropriate platforms
Also convert line endings to UNIX format for one Celestica file
* Add 'phy_an_lt_msft' to BCM config file permitted list
* add config.bcm for hlx
* modify config.bcm path for hlx
* Delete hx4-cel-hbtn-48x1G+4x10G.config.bcm
* add config.bcm and path
* update led for cxp
* Add new device data for dx010
