iwlwifi: move iwl_configure_rxq to be used by other op_modes

All the op_modes need to send this command as well. Instead of
duplicating the code from mvm, put the code in a common place.

Signed-off-by: Mordechay Goodstein <mordechay.goodstein@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20210331121101.deb71fce883a.I5eef009512f180e5974f3f491ff56c763cdcc878@changeid


Signed-off-by: Luca Coelho <luciano.coelho@intel.com>