arm64/crypto: improve performance of GHASH algorithm

This patches modifies the GHASH secure hash implementation to switch to a
faster, polynomial multiplication based reduction instead of one that uses
shifts and rotates.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git


Git-commit: b913a6404ce2b7d10a735834218d3c1e1bceff2a
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>