Add low-level initialization for hsmmc controller. Merged into
this patch patch are various improvments and board support by
Grazvydas Ignotas and David Brownell.

Also change wire4 to be wires, as some newer controllers support
8 data lines.

Cc: Pierre Ossman <drzeus-mmc@drzeus.cx>
Signed-off-by: NGrazvydas Ignotas <notasas@gmail.com>
Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: NTony Lindgren <tony@atomide.com>

Add Ethernet device support in board-ldp.c to make ldp can boot and mount
nfs successfully.
Signed-off-by: NStanley.Miao <stanley.miao@windriver.com>

This adds minimal board support for the OMAP3430 LDP development platform.
Signed-off-by: NNishant Kamat <nskamat@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>