board/t208x: update t2080qds/t2080rdb for errata A-007186

As errata A-007186, we need to use the alternate serdes
protocol instead of those impacted protocols.

- add support for serdes protocols: 0x1b, 0x50, 0x5e,
  0x64, 0x6a, 0xd2, 0x67, 0x70.
- update t2080_rcw.cfg to adapt to new rcw_66_15 for
  t2080qds and t2080rdb.

Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
5 files changed