iwlagn: rx antenna diversity

For the new 1x1 devices, hw and uCode will support rx
antenna diversity, but we need to indicate 1x1 device to
AccessPoint to make sure it won't use MIMO.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-core.h b/drivers/net/wireless/iwlwifi/iwl-core.h
index 568920a..d0b86f5 100644
--- a/drivers/net/wireless/iwlwifi/iwl-core.h
+++ b/drivers/net/wireless/iwlwifi/iwl-core.h
@@ -364,6 +364,7 @@
  * @scan_antennas: available antenna for scan operation
  * @led_mode: 0=blinking, 1=On(RF On)/Off(RF Off)
  * @adv_pm: advance power management
+ * @rx_with_siso_diversity: 1x1 device with rx antenna diversity
  *
  * We enable the driver to be backward compatible wrt API version. The
  * driver specifies which APIs it supports (with @ucode_api_max being the
@@ -412,6 +413,7 @@
 	u8 scan_tx_antennas[IEEE80211_NUM_BANDS];
 	enum iwl_led_mode led_mode;
 	const bool adv_pm;
+	const bool rx_with_siso_diversity;
 };
 
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