bd_info: remove bi_barudrate member from struct bd_info

bd_info: remove bi_barudrate member from struct bd_info

gd->bd->bi_baudrate is a copy of gd->baudrate.

Since baudrate is a common feature for all architectures,
keep gd->baudrate only.

It is true that bi_baudrate was passed to the kernel in that structure
but it was a long time ago.

Signed-off-by: Masahiro Yamada <[email protected]>
Cc: Tom Rini <[email protected]>
Cc: Simon Glass <[email protected]>
Cc: Wolfgang Denk <[email protected]>
Cc: Heiko Schocher <[email protected]>
Acked-by: Michal Simek <[email protected]> (For microblaze)