kx122: Note return method change in apichanges.md

Updated the API documentation with changes to the kx122.  Removed a few
extra EOL spaces.

Signed-off-by: Antoine W. Campagna <AntoineW@Campagna.org>
Signed-off-by: Noel Eck <noel.eck@intel.com>

docs/apichanges.md

@@ -4,6 +4,11 @@ API Changes                       {#apichanges}
 Here's a list of other API changes made to the library that break source/binary
 compatibility between releases:
 
+# vNext
+ * The interface of **kx122** has been modified to return values instead of
+ receiving pointers.  This applies to member functions: getWhoAmI,
+ getInterruptSource, getBufferStatus, getRawBufferSamples, and getBufferSamples.
+
 # v1.6.0
 
  * Several C libraries had their init function pin type modified from uint8_t

src/kx122/kx122.cxx

@@ -318,7 +318,7 @@ uint KX122::getBufferStatus()
   if(kx122_get_buffer_status(m_kx122, &nb_samples)){
     throw std::runtime_error(std::string(__FUNCTION__) + "kx122_get_buffer_status failed");
   }
-  
+
   return nb_samples;
 }
 
@@ -339,7 +339,7 @@ std::vector<float> KX122::getRawBufferSamples(uint len)
 	  xyz_array[i * 3 + 1] = buffery[i];
 	  xyz_array[i * 3 + 2] = bufferz[i];
   }
-  
+
   return xyz_array;
 }
 
@@ -349,7 +349,7 @@ std::vector<float> KX122::getBufferSamples(uint len)
   if(kx122_read_buffer_samples(m_kx122,len,bufferx,buffery,bufferz)){
     throw std::runtime_error(std::string(__FUNCTION__) + "kx122_read_buffer_samples failed");
   }
- 
+
   std::vector<float> xyz_array(len * 3);
   for (uint i = 0; i < len; i++)
   {
@@ -357,7 +357,7 @@ std::vector<float> KX122::getBufferSamples(uint len)
 	  xyz_array[i * 3 + 1] = buffery[i];
 	  xyz_array[i * 3 + 2] = bufferz[i];
   }
-  
+
   return xyz_array;
 }