ARM: OMAP: Split plat/mmc.h into local headers and platform_data

We need to remove this from plat for ARM common zImage
support.

Also remove includes not needed by the omap_hsmmc.c driver.

Cc: linux-mmc@vger.kernel.org
Acked-by: Chris Ball <cjb@laptop.org>
Acked-by: Venkatraman S <svenkatr@ti.com>
[tony@atomide.com: fold in removal of unused driver includes]
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/board-rm680.c

@@ -23,13 +23,13 @@
 #include <asm/mach-types.h>
 
 #include <plat/i2c.h>
-#include <plat/mmc.h>
 #include <plat/usb.h>
 #include <plat/gpmc.h>
 #include "common.h"
 #include <plat/serial.h>
 
 #include "mux.h"
+#include "mmc.h"
 #include "hsmmc.h"
 #include "sdram-nokia.h"
 #include "common-board-devices.h"