f2fs: switch to using the crc32 library

Now that the crc32() library function takes advantage of
architecture-specific optimizations, it is unnecessary to go through the
crypto API.  Just use crc32().  This is much simpler, and it improves
performance due to eliminating the crypto API overhead.

Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Acked-by: Chao Yu <chao@kernel.org>
Link: https://lore.kernel.org/r/20241202010844.144356-19-ebiggers@kernel.org


Signed-off-by: Eric Biggers <ebiggers@google.com>