bdinfo: net: ppc: Drop bi_enet1addr and other similar info

These values were 'old' in 2013 so it should be safe to remove them. They
are never set in U-Boot anyway, so the values will always be zero.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Stefan Roese <sr@denx.de>