ixgbe: Change the lan_id and func fields to a u8 to avoid casts

Since the lan_id and func fields only ever hold small values, make
them u8 to avoid casts used to silence warnings.
Signed-off-by: Mark Rustad <mark.d.rustad@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/ixgbe/ixgbe_common.c

@@ -3600,7 +3600,7 @@ s32 ixgbe_set_fw_drv_ver_generic(struct ixgbe_hw *hw, u8 maj, u8 min,
 	fw_cmd.hdr.cmd = FW_CEM_CMD_DRIVER_INFO;
 	fw_cmd.hdr.buf_len = FW_CEM_CMD_DRIVER_INFO_LEN;
 	fw_cmd.hdr.cmd_or_resp.cmd_resv = FW_CEM_CMD_RESERVED;
-	fw_cmd.port_num = (u8)hw->bus.func;
+	fw_cmd.port_num = hw->bus.func;
 	fw_cmd.ver_maj = maj;
 	fw_cmd.ver_min = min;
 	fw_cmd.ver_build = build;

drivers/net/ethernet/intel/ixgbe/ixgbe_type.h

@@ -3122,8 +3122,8 @@ struct ixgbe_bus_info {
 	enum ixgbe_bus_width width;
 	enum ixgbe_bus_type type;
 
-	u16 func;
-	u16 lan_id;
+	u8 func;
+	u8 lan_id;
 };
 
 /* Flow control parameters */

drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c

@@ -862,7 +862,7 @@ static void ixgbe_disable_rx_x550(struct ixgbe_hw *hw)
 		fw_cmd.hdr.cmd = FW_DISABLE_RXEN_CMD;
 		fw_cmd.hdr.buf_len = FW_DISABLE_RXEN_LEN;
 		fw_cmd.hdr.checksum = FW_DEFAULT_CHECKSUM;
-		fw_cmd.port_number = (u8)hw->bus.lan_id;
+		fw_cmd.port_number = hw->bus.lan_id;
 
 		status = ixgbe_host_interface_command(hw, (u32 *)&fw_cmd,
 					sizeof(struct ixgbe_hic_disable_rxen),