spi: kirkwood_spi.c: Add compatible match ID for Armada 375

This enables this driver for the Marvell Armada 375 SoC.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Luka Perkov <luka.perkov@sartura.hr>
Reviwer-by: Jagan Teki <jteki@openedev.com>

drivers/spi/kirkwood_spi.c

@@ -315,6 +315,7 @@ static const struct dm_spi_ops mvebu_spi_ops = {
 };
 
 static const struct udevice_id mvebu_spi_ids[] = {
+	{ .compatible = "marvell,armada-375-spi" },
 	{ .compatible = "marvell,armada-380-spi" },
 	{ .compatible = "marvell,armada-xp-spi" },
 	{ }