Recognize SDRplay RSP2 but do not support it effectively

plugins/samplesource/sdrplay/sdrplayinput.cpp

@@ -112,6 +112,8 @@ bool SDRPlayInput::openDevice()
 
     if (QString(product) == "RSP1A") {
         m_variant = SDRPlayRSP1A;
+    } else if (QString(product) == "RSP2") {
+        m_variant = SDRPlayRSP2;
     } else {
         m_variant = SDRPlayRSP1;
     }

plugins/samplesource/sdrplay/sdrplayinput.h

@@ -34,7 +34,8 @@ public:
     {
         SDRPlayUndef,
         SDRPlayRSP1,
-        SDRPlayRSP1A
+        SDRPlayRSP1A,
+        SDRPlayRSP2
     };
 
     class MsgConfigureSDRPlay : public Message {