net/mlx5e: Add ethtool support for dump module EEPROM

Add query MCIA, PMLP registers infrastructure and commands.
Add ethtool support for get_module_info() and get_module_eeprom()
callbacks.

Signed-off-by: Gal Pressman <galp@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/mlx5/driver.h b/include/linux/mlx5/driver.h
index 2e8758d..1a17067 100644
--- a/include/linux/mlx5/driver.h
+++ b/include/linux/mlx5/driver.h
@@ -113,9 +113,10 @@
 	MLX5_REG_PELC		 = 0x500e,
 	MLX5_REG_PVLC		 = 0x500f,
 	MLX5_REG_PCMR		 = 0x5041,
-	MLX5_REG_PMLP		 = 0, /* TBD */
+	MLX5_REG_PMLP		 = 0x5002,
 	MLX5_REG_NODE_DESC	 = 0x6001,
 	MLX5_REG_HOST_ENDIANNESS = 0x7004,
+	MLX5_REG_MCIA		 = 0x9014,
 	MLX5_REG_MLCR		 = 0x902b,
 };