BMX055/BMI055/BMC150: Add string based cons

Signed-off-by: Adelin Dobre <adelin.dobre@rinftech.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>

src/bmx055/bmx055.hpp

@@ -117,6 +117,13 @@ namespace upm {
                int magAddr=BMX055_DEFAULT_MAG_I2C_ADDR,
                int magCS=-1);
 
+        /**
+         * Instantiates BMX055 based on a given string.
+         *
+         * @param initStr string containing specific information for BMX055 initialization.
+         */
+       BMX055(std::string initStr);
+
         /**
          * BMX055 Destructor.
          */