Configure SPI for `STEMCELL` board (#25486)

platforms/chibios/boards/STEMCELL/configs/config.h

@@ -27,3 +27,18 @@
 #    define SERIAL_USART_DRIVER SD2
 #endif
 
+/**======================
+ **    SPI Driver
+ *========================**/
+#ifndef SPI_DRIVER
+#    define SPI_DRIVER SPID1
+#endif
+#ifndef SPI_SCK_PIN
+#    define SPI_SCK_PIN B1
+#endif
+#ifndef SPI_MISO_PIN
+#    define SPI_MISO_PIN B3
+#endif
+#ifndef SPI_MOSI_PIN
+#    define SPI_MOSI_PIN B2
+#endif

platforms/chibios/boards/STEMCELL/configs/mcuconf.h

@@ -196,7 +196,7 @@
 /*
  * SPI driver system settings.
  */
-#define STM32_SPI_USE_SPI1                  FALSE
+#define STM32_SPI_USE_SPI1                  TRUE
 #define STM32_SPI_USE_SPI2                  FALSE
 #define STM32_SPI_USE_SPI3                  FALSE
 #define STM32_SPI_SPI1_RX_DMA_STREAM        STM32_DMA_STREAM_ID(2, 0)