[PATCH net-next] net: dsa: mv88e6xxx: Fix W=1 warning with !CONFIG_OF

[Andrew Lunn]

When building on platforms without device tree, e.g. amd64, W=1 gives
a warning about mv88e6xxx_mdio_external_match being unused. Replace
of_match_node() with of_device_is_compatible() to prevent this
warning.

Suggested-by: Andy Shevchenko <andy.shevche...@gmail.com>
Signed-off-by: Andrew Lunn <and...@lunn.ch>
---
 drivers/net/dsa/mv88e6xxx/chip.c | 11 ++---------
 1 file changed, 2 insertions(+), 9 deletions(-)

diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index ee3b1a6b1ea8..fc3f02168462 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -3100,12 +3100,6 @@ static int mv88e6xxx_mdio_register(struct mv88e6xxx_chip 
*chip,
        return 0;
 }
 
-static const struct of_device_id mv88e6xxx_mdio_external_match[] = {
-       { .compatible = "marvell,mv88e6xxx-mdio-external",
-         .data = (void *)true },
-       { },
-};
-
 static void mv88e6xxx_mdios_unregister(struct mv88e6xxx_chip *chip)
 
 {
@@ -3125,7 +3119,6 @@ static void mv88e6xxx_mdios_unregister(struct 
mv88e6xxx_chip *chip)
 static int mv88e6xxx_mdios_register(struct mv88e6xxx_chip *chip,
                                    struct device_node *np)
 {
-       const struct of_device_id *match;
        struct device_node *child;
        int err;
 
@@ -3143,8 +3136,8 @@ static int mv88e6xxx_mdios_register(struct mv88e6xxx_chip 
*chip,
         * bus.
         */
        for_each_available_child_of_node(np, child) {
-               match = of_match_node(mv88e6xxx_mdio_external_match, child);
-               if (match) {
+               if (of_device_is_compatible(
+                           child, "marvell,mv88e6xxx-mdio-external")) {
                        err = mv88e6xxx_mdio_register(chip, child, true);
                        if (err) {
                                mv88e6xxx_mdios_unregister(chip);
-- 
2.28.0