Alexander Motin b56203ac03 Fix NTB_SDOORBELL_LOCKUP workaround.
Since SBARxSZ register can be write-once, it can be unusable for disabling
the SBAR.  For such case also set SBARxBASE to zero to not intersect with
config BAR.
2016-07-09 09:34:24 +00:00
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