ixgbevf: add wait for Rx queue disable
ixgbevf: add wait for Rx queue disable

New function was added to wait for Rx queues to be disabled before
disabling NAPI. This function also allows us to  modify
ixgbevf_rx_desc_queue_enable() to better match ixgbe.  I also cleaned up
some msleep calls to usleep_range while I was in this code anyway.

Signed-off-by: Alexander Duyck <af56634f9be8457194a3461ec96c497f138af4ff@intel.com>
Signed-off-by: Don Skidmore <db552506339f77ba9019f0c6d9084f81cf1d1757@intel.com>
Tested-by: Stephen Ko <62e072d38818c16b5fb04a74a1e79fd680cb696e@intel.com>
Signed-off-by: Jeff Kirsher <87e35f5be20bb3e67f4ba6b86f5f6be3085b1b3a@intel.com>
Signed-off-by: David S. Miller <fe08d3c717adf2ae63592e4c9aec6e3e404d8e3e@davemloft.net>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs