Added spi_send() to the spi.h.

include/libopenstm32/spi.h

@@ -288,6 +288,7 @@ int spi_init_master(u32 spi, u32 br, u32 cpol, u32 cpha, u32 dff, u32 lsbfirst);
 void spi_enable(u32 spi);
 void spi_disable(u32 spi);
 void spi_write(u32 spi, u16 data);
+void spi_send(u32 spi, u16 data);
 u16 spi_read(u32 spi);
 void spi_set_bidirectional_mode(u32 spi);
 void spi_set_unidirectional_mode(u32 spi);