Cosmetic changes from last PR

arch/arm/src/stm32l4/stm32l4_qspi.c

@@ -141,9 +141,9 @@
 #endif
 
 #ifdef CONFIG_STM32L4_QSPI_DMA
-#if !defined(DMACHAN_QUADSPI)
+#  if !defined(DMACHAN_QUADSPI)
 #    error QSPI DMA channel must be specified via DMACHAN_QUADSPI in your board.h
-#endif
+#  endif
 #endif
 
 #ifndef BOARD_AHB_FREQUENCY
@@ -1360,6 +1360,7 @@ static uint32_t qspi_setfrequency(struct qspi_dev_s *dev, uint32_t frequency)
       /* XXX we have no better return here, but the caller will find out
        * in their subsequent calls.
        */
+
       return 0;
     }