iwlwifi: fix config variable name in comment

The correct variable name was replaced here by mistake by commit
ab27926d ("iwlwifi: fix devices with PCI Device ID 0x34F0 and 11ac RF
modules").
Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Link: https://lore.kernel.org/r/20200210135817.31994-1-luca@lucaceresoli.netSigned-off-by: Luca Coelho <luciano.coelho@intel.com>

drivers/net/wireless/intel/iwlwifi/iwl-config.h

@@ -641,6 +641,6 @@ extern const struct iwl_cfg iwlax411_2ax_cfg_so_gf4_a0;
 extern const struct iwl_cfg iwlax411_2ax_cfg_so_gf4_a0_long;
 extern const struct iwl_cfg iwlax411_2ax_cfg_sosnj_gf4_a0;
 extern const struct iwl_cfg iwlax211_cfg_snj_gf_a0;
-#endif /* CPTCFG_IWLMVM || CPTCFG_IWLFMAC */
+#endif /* CONFIG_IWLMVM */
 
 #endif /* __IWL_CONFIG_H__ */