mpc85xx: Get rid of 'of_flat_dt_is_compatible'

This patch replaces 'of_flat_dt_is_compatible' with 'of_machine_is_compatible'.
The TL-WDR4900 platform file won't compile in the 6.1 kernel. The platform
files for the rest of the routers have been reworked or based on newer
solutions.

Let's make the TL-WDR4900 consistent with them.

Signed-off-by: Pawel Dembicki <[email protected]>

target/linux/mpc85xx/files/arch/powerpc/platforms/85xx/tl_wdr4900_v1.c

@@ -121,11 +121,8 @@ machine_arch_initcall(tl_wdr4900_v1, mpc85xx_common_publish_devices);
  */
 static int __init tl_wdr4900_v1_probe(void)
 {
-	unsigned long root = of_get_flat_dt_root();
-
-	if (of_flat_dt_is_compatible(root, "tplink,tl-wdr4900-v1"))
+	if (of_machine_is_compatible("tplink,tl-wdr4900-v1"))
 		return 1;
-
 	return 0;
 }