ARM: OMAP: Prototype for omap_mcbsp_set_io_type()

this patch add the function prototype of set I/O to the header file os it
could be used outside since it is exported, but not defined in the header
previously
Signed-off-by: Luís Vitório Cargnini <lvcargnini@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

include/asm-arm/arch-omap/mcbsp.h

@@ -318,5 +318,6 @@ void omap_mcbsp_set_spi_mode(unsigned int id, const struct omap_mcbsp_spi_cfg *
 /* Polled read/write functions */
 int omap_mcbsp_pollread(unsigned int id, u16 * buf);
 int omap_mcbsp_pollwrite(unsigned int id, u16 buf);
+int omap_mcbsp_set_io_type(unsigned int id, omap_mcbsp_io_type_t io_type);
 
 #endif