memory: omap-gpmc: Use a compatible match table when checking for NAND controller

As more compatibles can be added to the GPMC NAND controller driver
use a compatible match table.

Signed-off-by: Roger Quadros <[e-mail]>
Acked-by: Miquel Raynal <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
[krzysztof: remove "is_nand" variable]
Signed-off-by: Krzysztof Kozlowski <[e-mail]>

drivers/memory/omap-gpmc.c

···
 		}
 	}
 
-	if (of_device_is_compatible(child, "ti,omap2-nand")) {
+	if (of_match_node(omap_nand_ids, child)) {
 		/* NAND specific setup */
 		val = 8;
 		of_property_read_u32(child, "nand-bus-width", &val);

drivers/mtd/nand/raw/omap2.c

···
 	return ret;
 }
 
-static const struct of_device_id omap_nand_ids[] = {
-	{ .compatible = "ti,omap2-nand", },
-	{},
-};
+/* omap_nand_ids defined in linux/platform_data/mtd-nand-omap2.h */
 MODULE_DEVICE_TABLE(of, omap_nand_ids);
 
 static struct platform_driver omap_nand_driver = {

include/linux/platform_data/mtd-nand-omap2.h

···
 #define	_MTD_NAND_OMAP2_H
 
 #include <linux/mtd/partitions.h>
+#include <linux/mod_devicetable.h>
 
 #define	GPMC_BCH_NUM_REMAINDER	8
 
···
 	void __iomem	*gpmc_bch_result5[GPMC_BCH_NUM_REMAINDER];
 	void __iomem	*gpmc_bch_result6[GPMC_BCH_NUM_REMAINDER];
 };
-#endif
+
+static const struct of_device_id omap_nand_ids[] = {
+	{ .compatible = "ti,omap2-nand", },
+	{},
+};
+
+#endif /* _MTD_NAND_OMAP2_H */