loader/nso: Set main code region in VMManager

For rom directories (and by extension, XCI/NSP/NAX/NCA) this is for the NSO with name 'main', for regular NSOs, this is the NSO.

src/core/loader/nso.h

@@ -43,6 +43,7 @@ public:
 
     static std::optional<VAddr> LoadModule(Kernel::Process& process, const FileSys::VfsFile& file,
                                            VAddr load_base, bool should_pass_arguments,
+                                           bool should_register_data_segment,
                                            std::optional<FileSys::PatchManager> pm = {});
 
     ResultStatus Load(Kernel::Process& process) override;