cleanup whitespaces

sw/airborne/arch/stm32/mcu_periph/spi_arch.c

@@ -167,8 +167,8 @@ void dma1_c4_irq_handler(void)
   Spi2Slave0Unselect();
 
   if (DMA_GetITStatus(DMA1_IT_TC4)) {
-		// clear int pending bit
-		DMA_ClearITPendingBit(DMA1_IT_GL4);
+    // clear int pending bit
+    DMA_ClearITPendingBit(DMA1_IT_GL4);
 
     // mark as available
     spi_message_received = TRUE;
@@ -186,6 +186,3 @@ void dma1_c4_irq_handler(void)
   slave0->status = SPITransSuccess;
   *(slave0->ready) = 1;
 }
-
-
-

sw/airborne/arch/stm32/mcu_periph/spi_arch.h

@@ -160,7 +160,3 @@ extern void adxl345_start_reading_data(void);
 */
 
 #endif // SPI_ARCH_H
-
-
-
-