[Flang] fix a copy-paste error in scope.cpp

[xgupta]

Summary

found by PVS-Studio.

flang/lib/Semantics/scope.cpp

std::optional<parser::MessageFixedText> Scope::SetImportKind(ImportKind kind) {
   bool hasNone{kind == ImportKind::None || *importKind_ == ImportKind::None};
   bool hasAll{kind == ImportKind::All || *importKind_ == ImportKind::All};
   // Check C8100 and C898: constraints on multiple IMPORT statements
   if (hasNone || hasAll) {
     return hasNone
         ? "IMPORT,NONE must be the only IMPORT statement in a scope"_err_en_US
         : "IMPORT,ALL must be the only IMPORT statement in a scope"_err_en_US;
   } else if (kind != *importKind_ &&
-      (kind != ImportKind::Only || kind != ImportKind::Only)) {
+      (kind != ImportKind::Only && *importKind_ != ImportKind::Only)) {
     return "Every IMPORT must have ONLY specifier if one of them does"_err_en_US;
   } else {
     return std::nullopt;
   }
 }
 
 void Scope::add_importName(const SourceName &name) {
   importNames_.insert(name);