Changelog: Brought entries from tf-psa-crypto

Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
diff --git a/ChangeLog.d/removal-of-rng.txt b/ChangeLog.d/removal-of-rng.txt
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+++ b/ChangeLog.d/removal-of-rng.txt
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+API changes
+   * All API functions now use the PSA random generator psa_generate_random()
+     internally. As a consequence, functions no longer take RNG parameters.
+     Please refer to the migration guide at :
+     docs/4.0-migration-guide.md.
+
diff --git a/ChangeLog.d/unterminated-string-initialization.txt b/ChangeLog.d/unterminated-string-initialization.txt
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+Bugfix
+   * Silence spurious -Wunterminated-string-initialization warnings introduced
+     by GCC 15. Fixes #9944.