brcm63xx-arm: panther: Do not build libwifi and wfadatad

Do not build libwifi and wfadatad on panther. The target does not have
WiFi. Also disable the LUCI dashboard and admin-full which depend on
libiwinfo.

iopsys-brcm63xx-arm/config/panther/config

@@ -9,3 +9,10 @@ CONFIG_BCM_VOICE=y
 # CONFIG_PACKAGE_dslmngr is not set
 # CONFIG_PACKAGE_wifimngr is not set
 # CONFIG_PACKAGE_mwan3 is not set
+# CONFIG_PACKAGE_libiwinfo is not set
+# CONFIG_PACKAGE_libiwinfo-lua is not set
+# CONFIG_PACKAGE_wfadatad is not set
+
+# These luci packages two depend on iwinfo
+# CONFIG_PACKAGE_luci-mod-dashboard is not set
+# CONFIG_PACKAGE_luci-mod-admin-full is not set