[U-Boot] Custodian Repo for Broadcom (arm) boards

Tom & Albert, Please approve the creation of a custodian repo for the Broadcom (arm) boards. ( Wolfgang already has my public key... )

Wolfgang stated:

Before I can set up a new custodian repo, please post your offer on the U-Boot mailing list - I think the chips in question belong to the ARM architecture (?), so both the ARM custodian (Albert) and Tom should agree with the creation of such a new repo. Once I have their "go" it is only a matter of minutes.

Thanks! Steve