redhat/configs: Use SHA512 for module signing

Prarit Bhargavarequested to merge
prarit/kernel-ark:CONFIG_CRYPTO_SHA512 into os-build

kernsec.org recommends using SHA512 [1] for kernel module signing. There isn't any reason not to do this and the benefit is a stronger module hash.

[1] https://kernsec.org/wiki/index.php/Kernel_Self_Protection_Project/Recommended_Settings

Signed-off-by: Prarit Bhargava prarit@redhat.com

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