Fix Makefile go vet to use -unsafeptr=false, formatting in bmp180_test.go

devices/bmxx80/bmp180_test.go

@@ -17,7 +17,7 @@ var opts180 = &Opts{Temperature: O1x, Pressure: O1x}
 func TestNew180_fail_read_chipid(t *testing.T) {
 	bus := i2ctest.Playback{
 		Ops: []i2ctest.IO{
-		// Chip ID detection read fail.
+			// Chip ID detection read fail.
 		},
 		DontPanic: true,
 	}