Get DMA bus width from design config register

Signed-off-by: Bo Shen <voice.shen@atmel.com>
Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>

Signed-off-by: Wolfgang Denk <wd@denx.de>
[trini: Fixup common/cmd_io.c]
Signed-off-by: Tom Rini <trini@ti.com>

Add gigabit MAC support in macb driver
  - using IP version to distinguish whether MAC is GMAC

Signed-off-by: Bo Shen <voice.shen@atmel.com>

Signed-off-by: Stelian Pop <stelian <at> popies.net>
Acked-by: Haavard Skinnemoen <hskinnemoen <at> atmel.com>

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>