redhat/configs: automotive: stop overriding CRYPTO_ECDH

The git history in centos-stream-9/main-automotive is not very useful with determining why automotive decided to stop inheriting from RHEL on this config option.

Now, due to TCG_TPM2_HMAC/TCG_TPM being builtin, this config is forced to builtin, causing make dist-configs to fail for automotive:

Error: Mismatches found in configuration files for arm64 aarch64-automotive
Found CONFIG_CRYPTO_ECDH=y after generation, had CONFIG_CRYPTO_ECDH=m in Source tree

Since there's no obvious reason for automotive to make this a module, let's just ride RHEL's decisions here for now.

Signed-off-by: Andrew Halaney ahalaney@redhat.com