K 10
svn:author
V 6
marius
K 8
svn:date
V 27
2018-03-15T22:58:34.067960Z
K 7
svn:log
V 654
MFC: r327339, r327924

- There is no need to keep the tuning error and re-tuning interrupts
  enabled (though, no interrupt generation enabled for them) all the
  time as soon as (re-)tuning is supported; only enable them and let
  them generate interrupts when actually using (re-)tuning.
- Also disable all interrupts except SDHCI_INT_DATA_AVAIL ones while
  executing tuning and not just their signaling.
- Set the tuning error and re-tuning interrupt enable bits based on
  the SDHCI_TUNING_ENABLED rather than the SDHCI_TUNING_SUPPORTED flag,
  i. e. only when (re-)tuning is actually used. Currently, this change
  makes no net difference, though.

END