lime-hwd-usbradio: wait for primary_interface to be ready at boot, do

not depend on ath9k_htc as this module can support usb dongle based on
other drivers too

packages/lime-hwd-usbradio/Makefile

@@ -21,7 +21,7 @@ define Package/$(PKG_NAME)
   TITLE:=LiMe hardware detection usb radio support
   CATEGORY:=LiMe
   URL:=http://libre-mesh.org
-  DEPENDS:=+lime-system +lua +libuci-lua +kmod-ath9k-htc
+  DEPENDS:=+lime-system +lua +libuci-lua
 endef
 
 define Build/Compile

packages/lime-hwd-usbradio/src/hotplug-hook.sh

@@ -7,14 +7,14 @@ burstStopFile="/tmp/lime-hotplug-usbradio-burst-check"
 #[Doc] In the case burstStopFile exists the following code will be not executed
 [ -e "${burstStopFile}" ] ||
 {
-	#[Doc] Prepare Lua table with the hotplug parameters
-	lua_hotplug_args="hotplug_hook_args = { action='${ACTION}', devicename='${DEVICENAME}', devname='${DEVNAME}', devpath='${DEVPATH}', product='${PRODUCT}', type='${TYPE}', interface='${INTERFACE}' }"
-
 	#[Doc] Create burstStopFile; Write the date just for debugging
 	date > "${burstStopFile}"
 
-	#[Doc] Wait for the radio to be ready
+	#[Doc] Prepare Lua table with the hotplug parameters
+	lua_hotplug_args="hotplug_hook_args = { action='${ACTION}', devicename='${DEVICENAME}', devname='${DEVNAME}', devpath='${DEVPATH}', product='${PRODUCT}', type='${TYPE}', interface='${INTERFACE}' }"
+
+	#[Doc] Wait for lime primary_interface and the plugged radio to be ready
 	#[Doc] Configure the device calling lime-config but first execute lua_hotplug_args to pass hotplug parameters
 	#[Doc] Finally remove burstStopFile 
-	((sleep 2s ; lua -e"${lua_hotplug_args}" /usr/bin/lime-config ; rm -rf "${burstStopFile}")&)
+	((sleep 2s ; rm -rf "${burstStopFile}" ; find /sys/${DEVPATH} | grep -q ieee80211 && ( while [ $(awk '{print $1}' /proc/uptime | awk -F. '{print $1}') -lt 90 ] ; do sleep 2s; done ; lua -e"${lua_hotplug_args}" /usr/bin/lime-config ))&)
 }