Modified all iDistance sensors to return float.

Signed-off-by: Serban Waltter <serban.waltter@rinftech.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>

src/mb704x/mb704x.cxx

@@ -48,7 +48,7 @@ int MB704X::getRange()
     return mb704x_get_range(m_mb704x);
 }
 
-int MB704X::getDistance()
+float MB704X::getDistance()
 {
     return getRange();
 }

src/mb704x/mb704x.hpp

@@ -90,7 +90,7 @@ namespace upm {
          *
          * @return Distance to the object in cm
          */
-        virtual int getDistance();
+        virtual float getDistance();
     protected:
         // mb704x device context
         mb704x_context m_mb704x;