debugfs: Fix default access mode config check

This typo caused debugfs to always behave as if
CONFIG_DEBUG_FS_ALLOW_NONE was selected.

Fixes: f278809 ("debugfs: Remove broken no-mount mode")
Reported-by: Mark Brown <broonie@kernel.org>
Tested-by: Chen-Yu Tsai <wenst@chromium.org>
Signed-off-by: Aaron Thompson <dev@aaront.org>
Link: https://patch.msgid.link/20251202070927.14198-1-dev@null.aaront.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: dev-aaront-org

fs/debugfs/inode.c

@@ -35,7 +35,7 @@
 static struct vfsmount *debugfs_mount;
 static int debugfs_mount_count;
 static bool debugfs_registered;
-static bool debugfs_enabled __ro_after_init = IS_ENABLED(DEBUG_FS_ALLOW_ALL);
+static bool debugfs_enabled __ro_after_init = IS_ENABLED(CONFIG_DEBUG_FS_ALLOW_ALL);
 
 /*
  * Don't allow access attributes to be changed whilst the kernel is locked down