nxp hashcrypt: preserve AES OFB/CFB streaming state across calls

[night1rider]

Drive OFB/CFB from the ECB primitive with reg/tmp/left kept in the Aes context, add NULL/zero-length guards, and re-enable the streaming regression checks.

[wolfSSL-Bot]

Can one of the admins verify this patch?

[github-actions]

MemBrowse Memory Report

No memory changes detected for:

• gcc-arm-cortex-m0plus
• gcc-arm-cortex-m3
• gcc-arm-cortex-m4
• gcc-arm-cortex-m4-baremetal
• gcc-arm-cortex-m4-crypto-only
• gcc-arm-cortex-m4-dtls13
• gcc-arm-cortex-m4-min-ecc
• gcc-arm-cortex-m4-openssl-compat
• gcc-arm-cortex-m4-pkcs7
• gcc-arm-cortex-m4-pq
• gcc-arm-cortex-m4-rsa-only
• gcc-arm-cortex-m4-sp-math
• gcc-arm-cortex-m4-tls12
• gcc-arm-cortex-m4-tls13
• gcc-arm-cortex-m7
• gcc-arm-cortex-m7-pq
• gcc-arm-cortex-m7-tls13
• linuxkm-pie
• linuxkm-standard
• stm32-sim-stm32h753

[Copilot]

Pull request overview

This PR updates the NXP HASHCRYPT AES port to correctly maintain OFB/CFB streaming state across multiple calls by generating keystream from the ECB primitive and persisting reg/tmp/left in the Aes context. It also re-enables previously-disabled regression checks to verify correct streaming behavior.

Changes:

• Rework NXP HASHCRYPT AES OFB/CFB to be stateful across calls using per-block ECB keystream generation stored in the Aes context.
• Add NULL argument guards and explicit zero-length fast-path returns for the new OFB/CFB implementations.
• Remove #ifndef WOLFSSL_NXP_HASHCRYPT_AES skips in AES OFB/CFB streaming regression checks so the tests run for the NXP port again.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
wolfcrypt/src/port/nxp/hashcrypt_port.c	Implements stateful OFB/CFB using ECB keystream blocks and persisted context state (reg/tmp/left) to preserve streaming across calls.
wolfcrypt/test/test.c	Re-enables OFB/CFB streaming regression comparisons for WOLFSSL_NXP_HASHCRYPT_AES now that the port preserves state correctly.

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