ufs2: Fix can_page().

Return is boolean and not a status.

Change-Id: I03b74d8d7b9b205428665059a3b9d4dc708857a0
Reviewed-on: https://review.haiku-os.org/c/haiku/+/6861
Reviewed-by: Adrien Destugues <pulkomandy@pulkomandy.tk>

src/add-ons/kernel/file_systems/ufs2/kernel_interface.cpp

@@ -184,7 +184,7 @@ ufs2_put_vnode(fs_volume *_volume, fs_vnode *_node, bool reenter)
 static bool
 ufs2_can_page(fs_volume *_volume, fs_vnode *_node, void *_cookie)
 {
-	return B_NOT_SUPPORTED;
+	return false;
 }