wlan: Add get valid channels entry to NLA policy

qcacld-2.0 to prima Propagation.

improper validation of
QCA_WLAN_VENDOR_ATTR_EXTSCAN_GET_VALID_CHANNELS_CONFIG_PARAM_MAX_CHANNELS.

validate QCA_WLAN_VENDOR_ATTR_EXTSCAN_GET_VALID_CHANNELS_CONFIG_PARAM_MAX_CHANNELS.

CRs-Fixed: 2052990
Change-Id: I16e5808492b5b35dc8b646af45d6ac6d65561804
diff --git a/CORE/HDD/src/wlan_hdd_cfg80211.c b/CORE/HDD/src/wlan_hdd_cfg80211.c
index 81336cc..1c1ff25 100644
--- a/CORE/HDD/src/wlan_hdd_cfg80211.c
+++ b/CORE/HDD/src/wlan_hdd_cfg80211.c
@@ -2691,6 +2691,8 @@
                                                         { .type = NLA_U32 },
     [QCA_WLAN_VENDOR_ATTR_EXTSCAN_GET_VALID_CHANNELS_CONFIG_PARAM_WIFI_BAND] =
                                                         { .type = NLA_U32 },
+    [QCA_WLAN_VENDOR_ATTR_EXTSCAN_GET_VALID_CHANNELS_CONFIG_PARAM_MAX_CHANNELS] =
+                                                        { .type = NLA_U32 },
     [QCA_WLAN_VENDOR_ATTR_EXTSCAN_CHANNEL_SPEC_CHANNEL] = { .type = NLA_U32 },
     [QCA_WLAN_VENDOR_ATTR_EXTSCAN_CHANNEL_SPEC_DWELL_TIME] =
                                                             { .type = NLA_U32 },