cleanup trailing whitespaces

sw/airborne/mcu_periph/spi.h

@@ -100,7 +100,7 @@ enum SPIStatus {
 
 enum SPIBitOrder {
   SPIMSBFirst,
-  SPILSBFirst  
+  SPILSBFirst
 };
 
 enum SPIClockDiv {
@@ -120,7 +120,7 @@ enum SPIClockDiv {
  */
 struct spi_transaction;
 typedef void (*SPICallback)( struct spi_transaction *trans );
-  
+
 /** SPI transaction structure.
  * - Use this structure to store a request of SPI transaction
  *   and submit it using spi_submit function

sw/airborne/subsystems/datalink/w5100.c

@@ -307,7 +307,7 @@ static void configure_socket( uint8_t _s, uint8_t _flag, uint16_t _lport, uint16
   // configure destination port
   w5100_sock_set( _s, SOCK_DPORT, _dport >> 8 );
   w5100_sock_set( _s, SOCK_DPORT+1, _dport & 0xFF );
-  
+
   // send command to open the socket
   w5100_sock_set( _s, SOCK_CR, SOCK_OPEN );
 }