spi: atmel: Remove redundant list_empty checking

This checking is already done in __spi_validate().

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/drivers/spi/spi-atmel.c b/drivers/spi/spi-atmel.c
index b0842f7..88bebf8 100644
--- a/drivers/spi/spi-atmel.c
+++ b/drivers/spi/spi-atmel.c
@@ -1221,9 +1221,6 @@
 	dev_dbg(&spi->dev, "new message %p submitted for %s\n",
 					msg, dev_name(&spi->dev));
 
-	if (unlikely(list_empty(&msg->transfers)))
-		return -EINVAL;
-
 	atmel_spi_lock(as);
 	cs_activate(as, spi);