Restore ASMABI and other Unify work

Make sure all SHA2 transform function has wrappers

For ASMABI to work, it is required the calling convention
is consistent.

Reviewed-by: Tino Reichardt <milky-zfs@mcmilk.de>
Reviewed-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Signed-off-by: Joergen Lundman <lundman@lundman.net>
Closes #14569