tegra2: Modify MMC driver to handle power and cd GPIOs

Pass the GPIO numbers for power and card detect to tegra2_mmc_init(), and
modify that function to perform all required GPIO initialization. This
removes the need for board files to perform these operations.

Move board_mmc_getcd() into tegra2_mmc.c now that the driver knows which
GPIOs to use.

Update affected call-sites in seaboard.c and harmony.c. Note that this
change should make all SD ports work on Harmony, since the required GPIO
setup is now being performed.

v4: Fix prototype of tegra2_mmc_init() in board.h to match driver change.
    Remove prototype of gpio_config_mmc() from board.h

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Cc: Andy Fleming <afleming@gmail.com>
Tested-by: Simon Glass <sjg@chromium.org>
Acked-by: Simon Glass <sjg@chromium.org>
Acked-by: Andy Fleming <afleming@freescale.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
diff --git a/drivers/mmc/tegra2_mmc.h b/drivers/mmc/tegra2_mmc.h
index 671583c..b2f6c5b 100644
--- a/drivers/mmc/tegra2_mmc.h
+++ b/drivers/mmc/tegra2_mmc.h
@@ -123,9 +123,11 @@
 	unsigned int clock;	/* Current clock (MHz) */
 	unsigned int base;	/* Base address, SDMMC1/2/3/4 */
 	enum periph_id mmc_id;	/* Peripheral ID: PERIPH_ID_... */
+	int pwr_gpio;		/* Power GPIO */
+	int cd_gpio;		/* Change Detect GPIO */
 };
 
-int tegra2_mmc_init(int dev_index, int bus_width);
+int tegra2_mmc_init(int dev_index, int bus_width, int pwr_gpio, int cd_gpio);
 
 #endif	/* __ASSEMBLY__ */
 #endif	/* __TEGRA2_MMC_H_ */