debugger: prevent gdb from asking too many question for which we don't have answers

So far TRK does not show values for fp registers.

src/plugins/debugger/gdb/gdbengine.cpp

@@ -2654,8 +2654,16 @@ void GdbEngine::handleStackListThreads(const GdbResultRecord &record, const QVar
 
 void GdbEngine::reloadRegisters()
 {
-    postCommand(_("-data-list-register-values d"),
-                Discardable, CB(handleRegisterListValues));
+    if (m_gdbAdapter->isAdapter()) {
+        // FIXME: remove that special case. This is only to prevent
+        // gdb from asking for the values of the fixed point registers
+        postCommand(_("-data-list-register-values x 1 2 3 4 5 6 7 8 9 "
+                      "10 11 12 13 14 15 25"),
+                    Discardable, CB(handleRegisterListValues));
+    } else {
+        postCommand(_("-data-list-register-values x"),
+                    Discardable, CB(handleRegisterListValues));
+    }
 }
 
 void GdbEngine::setRegisterValue(int nr, const QString &value)