iwlwifi: change number of PAPD groups in PHY DB

The number of the PAPD group was increased in new devices.
Since we might now get empty entries on older devices, don't
warn if an entry is empty.

Signed-off-by: Ariej Marjieh <ariej.marjieh@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>