mm/early_ioremap: clean up the use of WARN() for debugging

mm/early_ioremap: clean up the use of WARN() for debugging

Using WARN() for debugging is strange when nothing is wrong, so replace
WARN(early_ioremap_debug) with pr_warn() + dump_stack().

Link: https://lkml.kernel.org/r/d4470531ce0c03fd80f9a1be7e8d8ae1bc60fcd1.1768220636.git.houwenlong.hwl@antgroup.com
Signed-off-by: Hou Wenlong <houwenlong.hwl@antgroup.com>
Suggested-by: Mike Rapoport <rppt@kernel.org>
Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Hou Wenlong <houwenlong.hwl@antgroup.com>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>