net/mlx5: Add support for PCIe power slot exceeded error in PME

Support a new hardware error type in port module events:
- error_type=0xc (PCIe system power slot exceeded)
Signed-off-by: Mikhael Goikhman <migo@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

drivers/net/ethernet/mellanox/mlx5/core/events.c

@@ -190,6 +190,8 @@ static const char *mlx5_pme_error_to_string(enum port_module_event_error_type er
 		return "High Temperature";
 	case MLX5_MODULE_EVENT_ERROR_BAD_CABLE:
 		return "Bad or shorted cable/module";
+	case MLX5_MODULE_EVENT_ERROR_PCIE_POWER_SLOT_EXCEEDED:
+		return "One or more network ports have been powered down due to insufficient/unadvertised power on the PCIe slot";
 	default:
 		return "Unknown error";
 	}

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

@@ -63,6 +63,7 @@ enum  port_module_event_error_type {
 	MLX5_MODULE_EVENT_ERROR_UNKNOWN_IDENTIFIER       = 0x5,
 	MLX5_MODULE_EVENT_ERROR_HIGH_TEMPERATURE         = 0x6,
 	MLX5_MODULE_EVENT_ERROR_BAD_CABLE                = 0x7,
+	MLX5_MODULE_EVENT_ERROR_PCIE_POWER_SLOT_EXCEEDED = 0xc,
 	MLX5_MODULE_EVENT_ERROR_NUM,
 };