SOLARIS: let xlator load if amd64/nfssrv is loaded

SOLARIS: let xlator load if amd64/nfssrv is loaded

The NFS translator-enabled kernel module refuses to load if
misc/nfssrv is not also loaded. We were only checking misc/nfssrv and
misc/sparcv9/nfssrv, though, not misc/amd64/nfssrv. Check that, too,
as it may be loaded on amd64 machines.

Reported by Robert Milkowski.

Change-Id: Idbb9c4136b87ffa4c72ca376738001fb6a3ca7d8
Reviewed-on: http://gerrit.openafs.org/2497
Tested-by: Andrew Deason <adeason@sinenomine.net>
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>