feat: separate include header guards for default clock configuration

[fabiangottstein]

In some cases it is necessary to include multiple default clock configuration header files in order to handle clock configuration of different hardware in one place. For that it is necessary to have separate header guards.

[github-actions]

🦙 MegaLinter status: ⚠️ WARNING

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
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✅ JSON	prettier	7	2	0	1.72s
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⚠️ MARKDOWN	markdown-link-check	6		2	120.37s
✅ MARKDOWN	markdown-table-formatter	6	1	0	0.89s
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✅ REPOSITORY	grype	yes		no	10.24s
✅ REPOSITORY	ls-lint	yes		no	0.06s
✅ REPOSITORY	secretlint	yes		no	40.21s
✅ REPOSITORY	trivy	yes		no	6.22s
✅ REPOSITORY	trivy-sbom	yes		no	1.15s
✅ REPOSITORY	trufflehog	yes		no	9.97s
⚠️ SPELL	lychee	32		1	87.09s
✅ YAML	prettier	9	1	0	1.35s
✅ YAML	v8r	9		0	4.24s
✅ YAML	yamllint	9		0	0.34s

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