wifi: iwlegacy: Fix GFP flags in allocation loop

wifi: iwlegacy: Fix GFP flags in allocation loop

Do not latch these flags, they should be re-evaluated for each
iteration of the loop.

Concretely, rxq->free_count is incremented during the loop so the
__GFP_NOWARN decision may be stale. There may be other reasons to
require the re-evaluation too.

Suggested-by: Stanislaw Gruszka <stf_xl@wp.pl>
Link: https://lore.kernel.org/all/20260327115739.GB16800@wp.pl/
Signed-off-by: Brendan Jackman <jackmanb@google.com>
Acked-by: Stanislaw Gruszka <stf_xl@wp.pl>
Link: https://patch.msgid.link/20260327-iwlegacy-gfp-fix-v1-1-b83e4db0bd66@google.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>