TMDReader: Add a way to get the required IOS version

Source/Core/Core/IOS/ES/Formats.cpp

@@ -51,6 +51,11 @@ bool TMDReader::IsValid() const
   return true;
 }
 
+u64 TMDReader::GetIOSId() const
+{
+  return Common::swap64(m_bytes.data() + 0x184);
+}
+
 u64 TMDReader::GetTitleId() const
 {
   return Common::swap64(m_bytes.data() + 0x18C);

Source/Core/Core/IOS/ES/Formats.h

@@ -29,6 +29,7 @@ public:
 
   bool IsValid() const;
 
+  u64 GetIOSId() const;
   u64 GetTitleId() const;
 
   struct Content