scripts: process_gperf: upgrade the asso_values type to unsigned short #82090
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The gperf tool automatically selects the optimal data type for the asso_value table, depending on the MAX_HASH_VALUE. However, there is a corner case when the tables generated on different stages of the build process have different data types, causing a link-time error. Upgrade the data type for the table from unsigned char to unsigned short to at least exclude this 8-bit to 16-bit transition. There is another potential issue with the 16-bit to 32-bit transition, but it seems not very likely to have 65k kernel objects anytime soon.
Fixes: #82059