remove USRP #define for UHD as his name exists in /usr/include/uhd internals

git-svn-id: http://svn.eurecom.fr/openair4G/trunk@6965 818b1a75-f10b-46b9-bf7c-635c3b92a50f

targets/ARCH/USRP/USERSPACE/LIB/usrp_lib.cpp

@@ -32,6 +32,12 @@
  * Author: HongliangXU : hong-liang-xu@agilent.com
  */
 
+#ifdef USRP
+/* USRP is both an enum in ettus library and a define for OAI */
+/* This removes the define for OAI */
+#undef USRP
+#endif
+
 #include <string.h>
 #include <pthread.h>
 #include <unistd.h>