iwlwifi: add 5965 SCD registers to iwl-prph.h

This patch adds SCD registers for 5965

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>