iwlwifi: correct one of the PCI struct names

One of the cfg struct names is mistakenly "iwl22000", when it should
be "iwl22560".

Chage-Id: If9fbfa4bceef81d028c90c98d47115fbe39da547
Signed-off-by: Ihab Zhaika <ihab.zhaika@intel.com>
Fixes: 2f7a3863 ("iwlwifi: rename the temporary name of A000 to the official 22000")
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>