Signed-off-by: NMatthew Wilcox <matthew.r.wilcox@intel.com>

sq_count and cq_count are always the same, so just call it 'count'.
Signed-off-by: NMatthew Wilcox <matthew.r.wilcox@intel.com>

Two callers with an almost identical long string of arguments, and
introducing a third soon.  Time to factor out the commonalities.
Signed-off-by: NMatthew Wilcox <matthew.r.wilcox@intel.com>

This driver is for devices that follow the NVM Express standard
Signed-off-by: NMatthew Wilcox <matthew.r.wilcox@intel.com>