spi: Rename SPI_TX_BP|QPP to SPI_TX_BYTE|QUAD

Since SPI_TX_* are spi_slave{} members so use spi protocol
notation instead spi flash programming, like

SPI_TX_BP  => SPI_TX_BYTE
SPI_TX_QPP => SPI_TX_QUAD

Cc: Simon Glass <sjg@chromium.org>
Tested-by: Jagan Teki <jteki@openedev.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Signed-off-by: Jagan Teki <jteki@openedev.com>
diff --git a/drivers/spi/ich.c b/drivers/spi/ich.c
index 64322dd..d11132c 100644
--- a/drivers/spi/ich.c
+++ b/drivers/spi/ich.c
@@ -753,7 +753,7 @@
 	 */
 	if (plat->ich_version == 7) {
 		slave->op_mode_rx = SPI_OPM_RX_AS;
-		slave->mode = SPI_TX_BP;
+		slave->mode = SPI_TX_BYTE;
 	}
 
 	return 0;