- essential support for 7260 chipset and DMA fixes
- assign mvm->pm_ops at beginning of function iwl_op_mode_mvm_start.
iwl_mvm_mac_setup_register() uses mvm->pm_ops, but it is called
before this field is set to a valid value.
- disable call to function iwl_mvm_prepare_multicast.
This function leads to a pagefault, as it aspects a list of multicast
addresses, but the list is empty as it is not generated by this port.
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