powerpc: Use str_on_off() helper in check_cache_coherency()

Remove hard-coded strings by using the str_on_off() helper function.

Signed-off-by: Thorsten Blum <[email protected]>
Signed-off-by: Madhavan Srinivasan <[email protected]>
Link: https://patch.msgid.link/[email protected]

Author: toblux

arch/powerpc/kernel/setup-common.c

@@ -834,8 +834,8 @@ static int __init check_cache_coherency(void)
 	if (devtree_coherency != KERNEL_COHERENCY) {
 		printk(KERN_ERR
 			"kernel coherency:%s != device tree_coherency:%s\n",
-			KERNEL_COHERENCY ? "on" : "off",
-			devtree_coherency ? "on" : "off");
+			str_on_off(KERNEL_COHERENCY),
+			str_on_off(devtree_coherency));
 		BUG();
 	}