rimage: select proper parse toml key functions based on data size

[abonislawski]

• rimage: toml_utils: add uint8/16 parsing support for TOML keys
• rimage: select proper parse toml key functions based on data size

[Copilot]

Pull Request Overview

This PR enhances the TOML parsing utilities by adding support for smaller integer types (uint8 and uint16) and updates existing code to use appropriately sized parsing functions based on the data being parsed.

• Added new parsing functions for uint8 and uint16 types (both hex and regular variants)
• Updated existing code to use the most appropriate parsing function based on data size requirements
• Improved type safety by matching parser return types to the actual field types being populated

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
tools/rimage/src/toml_utils.c	Implements new uint8/uint16 parsing functions for both hex and decimal values
tools/rimage/src/include/rimage/toml_utils.h	Adds function declarations for the new parsing utilities
tools/rimage/src/adsp_config.c	Updates function calls to use appropriately sized parsers instead of uint32 variants

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[softwarecki]

Great work on this update!