AP_Declination: Unify from print or println to printf.

libraries/AP_Declination/examples/AP_Declination_test/AP_Declination_test.cpp

@@ -83,7 +83,7 @@ void setup(void)
     uint16_t pass = 0, fail = 0;
     uint32_t total_time=0;
 
-    hal.console->print("Beginning Test. Please wait...\n");
+    hal.console->printf("Beginning Test. Please wait...\n");
 
     for(int16_t i = -90; i <= 90; i+=5)
     {
@@ -105,7 +105,7 @@ void setup(void)
             }
         }
     }
-    hal.console->print("Ending Test.\n\n");
+    hal.console->printf("Ending Test.\n\n");
     hal.console->printf("Total Pass: %i\n", pass);
     hal.console->printf("Total Fail: %i\n", fail);
     hal.console->printf("Average time per call: %.1f usec\n",