FreeBSD/src 3e9ec69 (r342193)sys/dev/ichwd ichwd.c

ichwd: add a few assertions about tco_version

Those should ensure correctness of ichwd_find_ich_lpc_bridge() and
ichwd_find_ich_lpc_bridge() as well as make it easier for both humans
and static analyzers to see the relation between tco_version and ich and
smb variables in ichwd_identify().

Reported by:    Coverity
CID:            1396314, 1396317
MFC after:      10 days
DeltaFile
+7-0sys/dev/ichwd/ichwd.c
+7-01 files

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