3878 blkdev needs to support DKIOCGMEDIAINFOEXT
Reviewed by: Saso Kiselkov <skiselkov.ml@gmail.com>
Reviewed by: Garrett D'Amore <garrett@damore.org>
Approved by: Garrett D'Amore <garrett@damore.org>
3839 AHCI: WARNINGs should be replaced by ASSERTs
Reviewed by: Jason King <jason.brian.king@gmail.com>
Reviewed by: Garrett D'Amore <garrett@damore.org>
Approved by: Dan McDonald <danmcd@nexenta.com>
	[illumos-gate merge]

commit 265b5a40862f786981e8192cb44ebb70ecc9cfc8
    3839 AHCI: WARNINGs should be replaced by ASSERTs
commit dba604f95b3742920553aafd90c5b67721b07723
    3878 blkdev needs to support DKIOCGMEDIAINFOEXT