Missing C pre-processor macro of “unquoted string” when using Nios® V processor

Description

Due to a problem in the Nios®V Processor BSP generation flow in Intel® Quartus® Prime Pro Edition Software version 21.3 to 22.3, the pre-processor macro of data type "unquoted string" cannot be found in the toolchain.cmake file.

Specifically, only the “unquoted string” macro assigned with the value “none” may be missing in the toolchain.cmske file. Other string values are not affected.