net: ipa: Use correct value for IPA_STATUS_SIZE

IPA_STATUS_SIZE was introduced in commit b8dc7d0e as a replacement
for the size of the removed struct ipa_status which had size
sizeof(__le32[8]). Use this value as IPA_STATUS_SIZE.

Fixes: b8dc7d0e

 ("net: ipa: stop using sizeof(status)")
Signed-off-by: Bert Karwatzki <spasswolf@web.de>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Link: https://lore.kernel.org/r/20230531103618.102608-1-spasswolf@web.de
Signed-off-by: Paolo Abeni <pabeni@redhat.com>