net: ieee802154: mrf24j40: Drop unneeded of_match_ptr()

Driver can be used in different environments and moreover, when compiled
with !OF, the compiler may issue a warning due to unused mrf24j40_of_match
variable. Hence drop unneeded of_match_ptr() call.

While at it, update headers block to reflect above changes.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210531132226.47081-1-andriy.shevchenko@linux.intel.comSigned-off-by: Stefan Schmidt <stefan@datenfreihafen.org>

drivers/net/ieee802154/mrf24j40.c

@@ -8,8 +8,8 @@
 
 #include <linux/spi/spi.h>
 #include <linux/interrupt.h>
+#include <linux/mod_devicetable.h>
 #include <linux/module.h>
-#include <linux/of.h>
 #include <linux/regmap.h>
 #include <linux/ieee802154.h>
 #include <linux/irq.h>
@@ -1388,7 +1388,7 @@ MODULE_DEVICE_TABLE(spi, mrf24j40_ids);
 
 static struct spi_driver mrf24j40_driver = {
 	.driver = {
-		.of_match_table = of_match_ptr(mrf24j40_of_match),
+		.of_match_table = mrf24j40_of_match,
 		.name = "mrf24j40",
 	},
 	.id_table = mrf24j40_ids,