Fix wrong SPI switch

Signed-off-by: Frederic Pillon <[email protected]>

Author: fpistm

cores/arduino/stm32/spi_com.c

@@ -118,7 +118,7 @@ uint32_t spi_getClkFreqInst(SPI_TypeDef * spi_inst)
   if(spi_inst != NP) {
     /* Get source clock depending on SPI instance */
     switch ((uint32_t)spi_inst) {
-#if defined(SPI1_BASE) || defined(SPI4_BASE) || defined(SPI5_BASE) || defined(SPI16_BASE)
+#if defined(SPI1_BASE) || defined(SPI4_BASE) || defined(SPI5_BASE) || defined(SPI6_BASE)
       /* Some STM32's (eg. STM32F302x8) have no SPI1, but do have SPI2/3. */
 #if defined SPI1_BASE
       case (uint32_t)SPI1: