use usb mount flags to detect if its read only, rather than checking global config.

sphaira/source/location.cpp

@@ -86,12 +86,11 @@ auto GetStdio(bool write) -> StdioEntries {
     log_write("[USBHSFS] got count: %u\n", count);
 
     StdioEntries out{};
-    const auto write_protect = App::GetWriteProtect();
 
     for (s32 i = 0; i < count; i++) {
         const auto& e = devices[i];
 
-        if (write && (write_protect || e.write_protect)) {
+        if (write && (e.write_protect || (e.flags & UsbHsFsMountFlags_ReadOnly))) {
             log_write("[USBHSFS] skipping write protect\n");
             continue;
         }