ecore-evas: Fix missing drm engine in list

Drm is an available ecore_evas engine if support was built for it,
however it was not being listed as an available engine. This adds drm
to the list of available engines.

@fix

Signed-off-by: Chris Michael <cp.michael@samsung.com>

src/lib/ecore_evas/ecore_evas_module.c

@@ -255,6 +255,12 @@ _ecore_evas_available_engines_get(void)
 #endif
 #ifdef BUILD_ECORE_EVAS_OPENGL_GLEW
                             ADDENG("opengl_glew");
+#endif
+                         }
+                       else if (!strcmp(name, "drm"))
+                         {
+#ifdef BUILD_ECORE_EVAS_DRM
+                            ADDENG("drm");
 #endif
                          }
                     }