spi: stm32: Add Serial Peripheral Interface driver for STM32MP

Add SPI driver support for STM32MP SoCs family.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index 7044da3..b80d363 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -234,6 +234,14 @@
 	  used to access the SPI NOR flash chips on platforms embedding
 	  this ST IP core.
 
+config STM32_SPI
+	bool "STM32 SPI driver"
+	depends on ARCH_STM32MP
+	help
+	  Enable the STM32 Serial Peripheral Interface (SPI) driver for STM32MP
+	  SoCs. This uses driver model and requires a device tree binding to
+	  operate.
+
 config TEGRA114_SPI
 	bool "nVidia Tegra114 SPI driver"
 	help