lib/alloc_tag: use %pe format specifier

The %pe format specifier is designed to print error pointers. It prints a
symbolic error name (eg. -EINVAL) and it makes the code simpler by
omitting PTR_ERR();

This patch fixes this cocci report:
lib/alloc_tag.c:776:63-70: WARNING: Consider using %pe to print PTR_ERR()

Link: https://lkml.kernel.org/r/[e-mail]
Signed-off-by: Zeng Chi <[e-mail]>
Acked-by: SeongJae Park <[e-mail]>
Acked-by: Suren Baghdasaryan <[e-mail]>
Cc: Kent Overstreet <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>

lib/alloc_tag.c

···
 
 	alloc_tag_cttype = codetag_register_type(&desc);
 	if (IS_ERR(alloc_tag_cttype)) {
-		pr_err("Allocation tags registration failed, errno = %ld\n", PTR_ERR(alloc_tag_cttype));
+		pr_err("Allocation tags registration failed, errno = %pe\n", alloc_tag_cttype);
 		free_mod_tags_mem();
 		shutdown_mem_profiling(true);
 		return PTR_ERR(alloc_tag_cttype);