Davinci: SPI: add the missing v2 patch changes

Two Indentation fixes.

Catch requests for full-duplex transfers when driver configured for
half-duplex operation only.

Signed-off-by: Nick Thompson <nick.thompson@ge.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>

drivers/spi/davinci_spi.c

@@ -266,6 +266,10 @@ int spi_xfer(struct spi_slave *slave, unsigned int bitlen,
 #ifndef CONFIG_SPI_HALF_DUPLEX
 	else
 		return davinci_spi_read_write(slave, len, din, dout, flags);
+#else
+	printf("SPI full duplex transaction requested with "
+	       "CONFIG_SPI_HALF_DUPLEX defined.\n");
+	flags |= SPI_XFER_END;
 #endif
 
 out: