UHHDDevice: Replace deprecated header uhd/utils/thread_priority.hpp

Fixes compilation warning:
In file included from osmo-trx/Transceiver52M/device/uhd/UHDDevice.cpp:31:
/usr/include/uhd/utils/thread_priority.hpp:10:17: note: #pragma message: This header is deprecated - please use <uhd/utils/thread.hpp> instead.

Header was moved in uhd.git c33928d2bbdd27688c3475e77fc461e7d16eba5a.

Change-Id: I6299df48a5e14c54eaa07288d166c705eb9ebdbe

Transceiver52M/device/uhd/UHDDevice.cpp

@@ -28,7 +28,6 @@
 #include <uhd/version.hpp>
 #include <uhd/property_tree.hpp>
 #include <uhd/usrp/multi_usrp.hpp>
-#include <uhd/utils/thread_priority.hpp>
 
 #ifdef HAVE_CONFIG_H
 #include "config.h"
@@ -36,6 +35,9 @@
 
 #ifndef USE_UHD_3_11
 #include <uhd/utils/msg.hpp>
+#include <uhd/utils/thread_priority.hpp>
+#else
+#include <uhd/utils/thread.hpp>
 #endif
 
 #define USRP_TX_AMPL     0.3