fpga: machxo2-spi: Address warning about unused variable

Address warning about unused variable in case CONFIG_OF is not set.

warning: unused variable 'of_match' [-Wunused-const-variable]
    static const struct of_device_id of_match[] = {

Fixes: 88fb3a002330 ("fpga: lattice machxo2: Add Lattice MachXO2 support")
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Tom Rix <trix@redhat.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Moritz Fischer <mdf@kernel.org>
Link: https://lore.kernel.org/r/20210618224618.1487323-1-mdf@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/fpga/machxo2-spi.c b/drivers/fpga/machxo2-spi.c
index 114a64d2b7a4d68f81b50f73f9c38446a370d3d5..1afb41aa20d7151ff82ceb05d656e244b83b2079 100644 (file)
--- a/drivers/fpga/machxo2-spi.c
+++ b/drivers/fpga/machxo2-spi.c
@@ -374,11 +374,13 @@ static int machxo2_spi_probe(struct spi_device *spi)
        return devm_fpga_mgr_register(dev, mgr);
 }
 
+#ifdef CONFIG_OF
 static const struct of_device_id of_match[] = {
        { .compatible = "lattice,machxo2-slave-spi", },
        {}
 };
 MODULE_DEVICE_TABLE(of, of_match);
+#endif
 
 static const struct spi_device_id lattice_ids[] = {
        { "machxo2-slave-spi", 0 },