qcacmn: Add QCA vendor attribute to configure ROAM_BAND

Add a QCA vendor attribute to configure the driver to use
roam band set by userpace. This attribute is also used to
get the configured roam band from the driver.

Change-Id: I5ea7f9d12b2a01e1b4baa43e46342af34bebba49
CRs-Fixed: 3009747

os_if/linux/qca_vendor.h

@@ -3233,6 +3233,14 @@ enum qca_vendor_attr_roam_candidate_selection_criteria {
  *	threshold value specified by the
  *	QCA_ATTR_ROAM_CONTROL_CANDIDATE_RSSI_THRESHOLD attribute shall be used.
  *
+ * @QCA_ATTR_ROAM_CONTROL_BAND_MASK: Unsigned 32-bit value.
+ *	Carries bitmask value of bits from &enum qca_set_band and represents
+ *	all the bands in which roaming is allowed. The configuration is valid
+ *	until next disconnection. If this attribute is not present, the
+ *	existing configuration shall be used. By default, roaming is allowed
+ *	on all bands supported by local device. When the value is set to
+ *	%QCA_SETBAND_AUTO, all supported bands shall be enabled.
+ *
  */
 enum qca_vendor_attr_roam_control {
 	QCA_ATTR_ROAM_CONTROL_ENABLE = 1,
@@ -3251,6 +3259,7 @@ enum qca_vendor_attr_roam_control {
 	QCA_ATTR_ROAM_CONTROL_CANDIDATE_RSSI_THRESHOLD_2P4GHZ = 14,
 	QCA_ATTR_ROAM_CONTROL_CANDIDATE_RSSI_THRESHOLD_5GHZ = 15,
 	QCA_ATTR_ROAM_CONTROL_CANDIDATE_RSSI_THRESHOLD_6GHZ = 16,
+	QCA_ATTR_ROAM_CONTROL_BAND_MASK = 17,
 
 	/* keep last */
 	QCA_ATTR_ROAM_CONTROL_AFTER_LAST,