Adding ADF7021 type in the description

SerialPort.cpp

@@ -68,7 +68,11 @@ const uint8_t MMDVM_DEBUG3       = 0xF3U;
 const uint8_t MMDVM_DEBUG4       = 0xF4U;
 const uint8_t MMDVM_DEBUG5       = 0xF5U;
 
-#define DESCRIPTION              "MMDVM-HS 20170319 (D-Star/DMR/YSF/P25)"
+#if defined(ADF7021_N_VER)
+#define DESCRIPTION              "MMDVM_HS-ADF7021N 20170319 (D-Star/DMR/YSF/P25)"
+#else
+#define DESCRIPTION              "MMDVM_HS-ADF7021 20170319 (D-Star/DMR/YSF/P25)"
+#endif
 
 #define concat(a, b, c) a " (Build: " b " " c ")"
 const char HARDWARE[] = concat(DESCRIPTION, __TIME__, __DATE__);