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The document is correct. In order to use SPI connections mentioned in the diagram, you need to place a SMIF component not SPI component. As the connections (and the section) mentioned in page 22 use QSPI's Single SPI interface. And for using 11.6 (SI) and 11.5 (SO), you need to enable SMIF datalines[0:1] in the component customizer.
The SMIF component can be used for Single SPI, Dual SPI, Quad SPI and Octa SPI interfaces.
Let me know if you need further clarifications.
Meenakshi Sundaram R