PLAT: OMAP: Add device configuration to support second HSMMC slot on OMAP 2430 and...

This patch adds device configuration to provide second HSMMC slot support
on OMAP 2430 and 3430 boards.

Signed-off-by: Jarkko Lavinen <jarkko.lavinen@nokia.com>
Change CONFIG_ARCH_OMAP24XX by CONFIG_ARCH_OMAP243X macro when this config
is needed only for 2430 boards.

Signed-off-by: Carlos Eduardo Aguiar <carlos.aguiar@indt.org.br>
Acked-by: Francisco Alecrim <francisco.alecrim@indt.org.br>
Signed-off-by: Tony Lindgren <tony@atomide.com>