AT+CGSN with EC2X does not take parameter

Standard 3GPP TS27.007 states that the AT+CGSN command can optionally
have type parameter that determines the output. However Quiectel EC2X
series doesn't accept parameters. We need to reflect that in the
cellular properties setup.

features/cellular/framework/targets/QUECTEL/EC2X/QUECTEL_EC2X.cpp

@@ -29,7 +29,7 @@ static const intptr_t cellular_properties[AT_CellularBase::PROPERTY_MAX] = {
     AT_CellularNetwork::RegistrationModeLAC,    // C_EREG
     AT_CellularNetwork::RegistrationModeLAC,    // C_GREG
     AT_CellularNetwork::RegistrationModeLAC,    // C_REG
-    1,  // AT_CGSN_WITH_TYPE
+    0,  // AT_CGSN_WITH_TYPE
     1,  // AT_CGDATA
     0,  // AT_CGAUTH
     1,  // AT_CNMI