[net: PATCH] net: mvmdio: fix compilation warning

[Marcin Wojtas <mw@semihalf.com>]

The kernel test robot reported a following issue:

>> drivers/net/ethernet/marvell/mvmdio.c:426:36: warning:
unused variable 'orion_mdio_acpi_match' [-Wunused-const-variable]
   static const struct acpi_device_id orion_mdio_acpi_match[] = {
                                      ^
   1 warning generated.

Fix that by surrounding the variable by appropriate ifdef.

Fixes: c54da4c1acb1 ("net: mvmdio: add ACPI support")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Marcin Wojtas <mw@semihalf.com>
---
 drivers/net/ethernet/marvell/mvmdio.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/marvell/mvmdio.c b/drivers/net/ethernet/marvell/mvmdio.c
index 62a97c46fba0..ef878973b859 100644
--- a/drivers/net/ethernet/marvell/mvmdio.c
+++ b/drivers/net/ethernet/marvell/mvmdio.c
@@ -429,12 +429,14 @@ static const struct of_device_id orion_mdio_match[] = {
 };
 MODULE_DEVICE_TABLE(of, orion_mdio_match);
 
+#ifdef CONFIG_ACPI
 static const struct acpi_device_id orion_mdio_acpi_match[] = {
 	{ "MRVL0100", BUS_TYPE_SMI },
 	{ "MRVL0101", BUS_TYPE_XSMI },
 	{ },
 };
 MODULE_DEVICE_TABLE(acpi, orion_mdio_acpi_match);
+#endif
 
 static struct platform_driver orion_mdio_driver = {
 	.probe = orion_mdio_probe,
-- 
2.29.0