net/mlx5: Accel, Remove unnecessary header include

The include of Ethernet driver header in core is not needed
and actually wrong.
Remove it.

Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Reviewed-by: Maxim Mikityanskiy <maximmi@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

drivers/net/ethernet/mellanox/mlx5/core/accel/accel.h

@@ -5,7 +5,6 @@
 
 #include <linux/skbuff.h>
 #include <linux/netdevice.h>
-#include "en.h"
 
 static inline bool is_metadata_hdr_valid(struct sk_buff *skb)
 {