zfs on sparc needs const static int sha1_consts[] = { ... } inside SHA1Transform() to compile

[KireinaHoro]

System information

Type	Version/Name
Distribution Name	Gentoo Linux
Distribution Version	Live
Linux Kernel	4.9.49
Architecture	UltraSPARC T2
ZFS Version	[all]
SPL Version	[all]

Describe the problem you're observing

https://github.com/bahamas10/openzfs/blob/d4732e670edab07052ad1ccbcb4497c9bf6df199/usr/src/common/crypto/sha1/sha1.c#L502-L538

We need that as well, as SHA1_CONST macro has defined the behavior is to use this array on sparc, yet which was not implemented in the sources, which would result in the linker not finding the corresponding symbol sha1_consts.

https://github.com/zfsonlinux/zfs/blob/87f9371aefca857e7091dfdee3ec2d36b0de54c4/module/icp/include/sha1/sha1_consts.h#L46-L49

Describe how to reproduce the problem

[inapplicable]

Include any warning/errors/backtraces from the system logs

[inapplicable]

[KireinaHoro]

Adding this fixed the undefined reference issue mentioned in #6733 . The port to SPARC works now and passed ztest successfully.

[behlendorf]

@KireinaHoro thanks for digging in to this. It would be great if you could open a PR with the needed fixes so we can get it reviewed and merged.