Platform DCS-7060DX5-32 MMU rollback to avoid dependancy on Broadcom (#21035)

Why I did it
This commit is to avoid Broadcom driver dependency on the MMU config

Work item tracking
Microsoft ADO (number only):
How I did it
We upload the basic version of the Broadcom configure with limited configuration.

How to verify it
We verified the change internally in Arista

Author: vincentpcng