Only iwlmvm uses this function and it's so simple that it's clearer if
it's spelled out in the code anyway, so remove it and add the check
where needed.
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20200926002540.9e2f296f5cfc.I4b2c025768b5ceff93a80ba0ae9ee7784d6d7402@changeidSigned-off-by: Luca Coelho <luciano.coelho@intel.com>