wifi: iwlwifi: mvm: use iwl_mvm_is_vendor_in_approved_list()

We have this helper now instead of open-coding the check for
the dmi_tas_approved_list, so use it even here. It was added
for debugfs use, but it's better to be consistent.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230614123446.f3741f5cdef4.I5e0bf522189dc595ee38d05e93994211d32ec0f4@changeidSigned-off-by: Johannes Berg <johannes.berg@intel.com>

drivers/net/wireless/intel/iwlwifi/mvm/fw.c

@@ -1182,7 +1182,7 @@ static void iwl_mvm_tas_init(struct iwl_mvm *mvm)
 	if (ret == 0)
 		return;
 
-	if (!dmi_check_system(dmi_tas_approved_list)) {
+	if (!iwl_mvm_is_vendor_in_approved_list()) {
 		IWL_DEBUG_RADIO(mvm,
 				"System vendor '%s' is not in the approved list, disabling TAS in US and Canada.\n",
 				dmi_get_system_info(DMI_SYS_VENDOR));