spi: Use of_node_name_eq for node name comparisons

Convert string compares of DT node names to use of_node_name_eq helper
instead. This removes direct access to the node name pointer.
Signed-off-by: NRob Herring <robh@kernel.org>
Signed-off-by: NMark Brown <broonie@kernel.org>

drivers/spi/spi.c

@@ -1666,7 +1666,7 @@ static int of_spi_parse_dt(struct spi_controller *ctlr, struct spi_device *spi,
 	}
 
 	if (spi_controller_is_slave(ctlr)) {
-		if (strcmp(nc->name, "slave")) {
+		if (!of_node_name_eq(nc, "slave")) {
 			dev_err(&ctlr->dev, "%pOF is not called 'slave'\n",
 				nc);
 			return -EINVAL;