omap3: Zoom2/3: Update hsmmc board config params

Update the hsmmc zoom peripheral configuration to support:
Power saving mode
mmc2 8-bit support
Configure mmc2 as non removable

Signed-off-by: Madhusudhan Chikkature <madhu.cr@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>