ixgbe: Add FCoE DDP allocation failure counters to ethtool stats.

Add 2 new counters to ethtool:
	1. Count DDP allocation failure since we max the number of buffers
		allowed in one DDP context.
	2. Count DDP allocation failure since we max the number of buffers
		allowed in one DDP context when we alloc an extra buffer.

Signed-off-by: Amir Hanania <amir.hanania@intel.com>
Tested-by: Ross Brattain <ross.b.brattain@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.h b/drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.h
index 99de145..261fd62 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.h
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.h
@@ -73,6 +73,8 @@
 	unsigned char *extra_ddp_buffer;
 	dma_addr_t extra_ddp_buffer_dma;
 	unsigned long mode;
+	u64 __percpu *pcpu_noddp;
+	u64 __percpu *pcpu_noddp_ext_buff;
 #ifdef CONFIG_IXGBE_DCB
 	u8 up;
 #endif