MMC: OMAP: Remove some opcodes from host driver

This patch removes some opcodes from host driver so there's no need on putting
'#include <linux/mmc/mmc.h>', that should not be needed in host drivers.

Signed-off-by: Carlos Eduardo Aguiar <carlos.aguiar@indt.org.br>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>