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>
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_common.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_common.c
index 8c7e78b..dfdb114 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_common.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_common.c
@@ -3600,7 +3600,7 @@
 	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;
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h b/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
index d02a0a3..7ae4bbd 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
@@ -3122,8 +3122,8 @@
 	enum ixgbe_bus_width width;
 	enum ixgbe_bus_type type;
 
-	u16 func;
-	u16 lan_id;
+	u8 func;
+	u8 lan_id;
 };
 
 /* Flow control parameters */
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c
index 9d3f765..5affac1 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c
@@ -862,7 +862,7 @@
 		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),