iwlwifi: fix non_shared_ant for 9000 devices

The non-shared antenna was wrong for 9000 device series.  Fix it to
ANT_B for correct antenna preference by coex in MVM driver.

Fixes: 89374fe6 ("iwlwifi: Add new PCI IDs for 9260 and 5165 series")
Signed-off-by: Erel Geron <erelx.geron@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>