iwlwifi: mvm: correctly request DTS-measure for new cards

Since the 8000 series, the DTS measurement request command has been
changed. Use an ucode capability flag to determine which version is
supported and send the extended command when needed.

Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>