alloc_tag: fix allocation tag reporting when CONFIG_MODULES=n

alloc_tag: fix allocation tag reporting when CONFIG_MODULES=n

codetag_module_init() is used to initialize sections containing allocation
tags.  This function is used to initialize module sections as well as core
kernel sections, in which case the module parameter is set to NULL.  This
function has to be called even when CONFIG_MODULES=n to initialize core
kernel allocation tag sections.  When CONFIG_MODULES=n, this function is a
NOP, which is wrong.  This leads to /proc/allocinfo reported as empty.
Fix this by making it independent of CONFIG_MODULES.

Link: https://lkml.kernel.org/r/[email protected]
Fixes: 916cc5167cc6 ("lib: code tagging framework")
Signed-off-by: Suren Baghdasaryan <[email protected]>
Cc: David Hildenbrand <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: Kent Overstreet <[email protected]>
Cc: Pasha Tatashin <[email protected]>
Cc: Sourav Panda <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Cc: <[email protected]>	[6.10+]
Signed-off-by: Andrew Morton <[email protected]>