i40e: remove duplicate pfc stats

The pfc related priority stats are already handled separately as these
stats are actually arrays of length I40E_MAX_USER_PRIORITY. Thus,
including them within i40e_gstrings_stats will just duplicate data.

Worse, the sizeof will be incorrect, as it will be the total size of the
stat arrays, which in this case is 8 * sizeof(u64), so we will only copy
the stat contents as if they were a u32.

Since we already correctly handle these stats else where, remove them
from the i40e_gstrings_stats.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/i40e/i40e_ethtool.c

@@ -103,10 +103,6 @@ static const struct i40e_stats i40e_gstrings_stats[] = {
 	I40E_PF_STAT("link_xoff_rx", stats.link_xoff_rx),
 	I40E_PF_STAT("link_xon_tx", stats.link_xon_tx),
 	I40E_PF_STAT("link_xoff_tx", stats.link_xoff_tx),
-	I40E_PF_STAT("priority_xon_rx", stats.priority_xon_rx),
-	I40E_PF_STAT("priority_xoff_rx", stats.priority_xoff_rx),
-	I40E_PF_STAT("priority_xon_tx", stats.priority_xon_tx),
-	I40E_PF_STAT("priority_xoff_tx", stats.priority_xoff_tx),
 	I40E_PF_STAT("rx_size_64", stats.rx_size_64),
 	I40E_PF_STAT("rx_size_127", stats.rx_size_127),
 	I40E_PF_STAT("rx_size_255", stats.rx_size_255),