iwlwifi: dbg: align wrt log prints to the same format

Align wrt log prints to the driver coding style
Remove the ext field from the log and print it at the beginning of the
apply point.

Signed-off-by: Shahar S Matityahu <shahar.s.matityahu@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>