iwlwifi: mvm: make iwl_mvm_reconfig_scd() static

There's no need to have this in a different place, it's
only used in a single C file (sta.c).

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20220205112029.699b4b9c2232.I0d7970d800a51fee5135946ee03a7d9e8a811893@changeid
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>