RangeFinder: fixed example build

libraries/AP_RangeFinder/examples/MaxsonarXL_test/MaxsonarXL_test.pde

@@ -11,6 +11,7 @@
 #include <AP_Math.h>
 #include <AP_RangeFinder.h>
 #include <AP_ADC.h>
+#include <AP_ADC_AnalogSource.h>
 #include <Filter.h>
 #include <AP_Buffer.h>
 #include <AP_HAL_AVR.h>
@@ -35,11 +36,7 @@
 ////////////////////////////////////////////////////////////////////////////////
 
 
-#if CONFIG_HAL_BOARD == HAL_BOARD_APM2
-const AP_HAL::HAL& hal = AP_HAL_AVR_APM2;
-#else
-const AP_HAL::HAL& hal = AP_HAL_AVR_APM1;
-#endif
+const AP_HAL::HAL& hal = AP_HAL_BOARD_DRIVER;
 
 // declare global instances
 ModeFilterInt16_Size5 mode_filter(2);