STM32 SPI driver is not capable to handle device mode with stm32f4 soc.
Stop probing if this case happens.
Signed-off-by: Valentin Caron <valentin.caron@foss.st.com>
Link: https://lore.kernel.org/r/20230706081342.468090-1-valentin.caron@foss.st.comSigned-off-by: Mark Brown <broonie@kernel.org>