Alexander Motin e4ee6c5444 Fix SES on device slots without phys after r349321.
Broadcom 9400-8i8e HBAs report virtual SES device, where slots representing
external connectors are reported having no phys.  Since sasdev_phys is NULL
there and proto_hdr is a union, ses_paths_iter() misinterpreted them as ATA.
Add explicit protocol check to properly differentiate them.

MFC after:	1 week
Sponsored by:	iXsystems, Inc.
2020-03-19 17:20:50 +00:00
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