qcacmn: QCA vendor attribute to configure periodic sounding

Add a new QCA vendor attribute to configure the periodic sounding for Tx
beamformer functionality.

Change-Id: I2f36f98b6665d448c07d676ff9a5fa907a980c5c
CRs-Fixed: 3328364

os_if/linux/qca_vendor.h

@@ -5156,6 +5156,16 @@ enum qca_wlan_vendor_attr_config {
 	 */
 	QCA_WLAN_VENDOR_ATTR_CONFIG_DBAM = 83,
 
+	/* 8-bit unsigned value to configure the driver to enable/disable the
+	 * periodic sounding for Tx beamformer functionality. The default
+	 * behavior uses algorithm to do sounding based on packet stats.
+	 *
+	 * 0 - Default behavior.
+	 * 1 - Enable the periodic sounding for Tx beamformer.
+	 * This attribute is used for testing purposes.
+	 */
+	QCA_WLAN_VENDOR_ATTR_CONFIG_BEAMFORMER_PERIODIC_SOUNDING = 85,
+
 	/* keep last */
 	QCA_WLAN_VENDOR_ATTR_CONFIG_AFTER_LAST,
 	QCA_WLAN_VENDOR_ATTR_CONFIG_MAX =