Add empty MPL3115 driver

src/mgos_barometer_mpl3115.c

@@ -0,0 +1,21 @@
+#include "mgos_barometer_mpl115.h"
+#include "mgos_i2c.h"
+
+// Datasheet:
+// https://cdn-shop.adafruit.com/datasheets/1893_datasheet.pdf
+
+bool mgos_barometer_mpl3115_detect(struct mgos_barometer *dev) {
+  return false;
+}
+
+bool mgos_barometer_mpl3115_create(struct mgos_barometer *dev) {
+  return false;
+}
+
+bool mgos_barometer_mpl3115_destroy(struct mgos_barometer *dev){
+  return false;
+}
+
+bool mgos_barometer_mpl3115_read(struct mgos_barometer *dev) {
+  return false;
+}