uboot-phytec

spi: spi-uclass: Set slave wordlen with SPI_DEFAULT_WORDLEN

In some case wordlen may not be set. Use SPI_DEFAULT_WORDLEN as default.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Jagan Teki <jteki@openedev.com>