spi: a3700: Return correct value on timeout detection

When waiting for transfer completion, a3700_spi_wait_completion
returns a boolean indicating if a timeout occurred.

The function was returning 'true' everytime, failing to detect any
timeout.

This patch makes it return 'false' when a timeout is reached.
Signed-off-by: NMaxime Chevallier <maxime.chevallier@smile.fr>
Signed-off-by: NMark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org

drivers/spi/spi-armada-3700.c

@@ -387,7 +387,8 @@ static bool a3700_spi_wait_completion(struct spi_device *spi)
 
 	spireg_write(a3700_spi, A3700_SPI_INT_MASK_REG, 0);
 
-	return true;
+	/* Timeout was reached */
+	return false;
 }
 
 static bool a3700_spi_transfer_wait(struct spi_device *spi,