tegra2: Move tegra2_mmc_init() prototype to public header.

tegra2_mmc_init() is implemented by the Tegra2 MMC driver. Since most of
the Tegra2-based boards will need to call it, this commit exports it in
the new public asm/arch/mmc.h header file to prevent each board from
providing its own prototype.

Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Acked-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>

arch/arm/include/asm/arch-tegra2/mmc.h

+/*
+ * Copyright (c) 2011, Google Inc. All rights reserved.
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#ifndef _TEGRA2_MMC_H_
+#define _TEGRA2_MMC_H_
+
+int tegra2_mmc_init(int dev_index, int bus_width, int pwr_gpio, int cd_gpio);
+
+#endif /* TEGRA2_MMC_H_ */

board/nvidia/common/board.h

@@ -25,7 +25,6 @@
 #define _BOARD_H_
 
 void gpio_config_uart(void);
-int tegra2_mmc_init(int dev_index, int bus_width, int pwr_gpio, int cd_gpio);
 void gpio_early_init_uart(void);
 
 #endif	/* BOARD_H */

board/nvidia/harmony/harmony.c

@@ -25,11 +25,11 @@
 #include <asm/io.h>
 #include <asm/arch/tegra2.h>
 #include <asm/arch/pinmux.h>
+#include <asm/arch/mmc.h>
 #include <asm/gpio.h>
 #ifdef CONFIG_TEGRA2_MMC
 #include <mmc.h>
 #endif
-#include "../common/board.h"
 
 /*
  * Routine: gpio_config_uart

board/nvidia/seaboard/seaboard.c

@@ -25,11 +25,11 @@
 #include <asm/io.h>
 #include <asm/arch/tegra2.h>
 #include <asm/arch/pinmux.h>
+#include <asm/arch/mmc.h>
 #include <asm/gpio.h>
 #ifdef CONFIG_TEGRA2_MMC
 #include <mmc.h>
 #endif
-#include "../common/board.h"
 
 /* TODO: Remove this code when the SPI switch is working */
 #ifndef CONFIG_SPI_UART_SWITCH

drivers/mmc/tegra2_mmc.h

@@ -127,7 +127,5 @@ struct mmc_host {
 	int cd_gpio;		/* Change Detect GPIO */
 };
 
-int tegra2_mmc_init(int dev_index, int bus_width, int pwr_gpio, int cd_gpio);
-
 #endif	/* __ASSEMBLY__ */
 #endif	/* __TEGRA2_MMC_H_ */