mountd: allow build without USB_SUPPORT

Signed-off-by: Felix Fietkau <[email protected]>

package/system/mountd/Makefile

@@ -23,7 +23,7 @@ define Package/mountd
   SECTION:=utils
   CATEGORY:=Utilities
   TITLE:=OpenWrt automount daemon
-  DEPENDS:=@USB_SUPPORT +uci +kmod-usb-storage +kmod-fs-autofs4
+  DEPENDS:=+USB_SUPPORT:kmod-usb-storage +uci +kmod-fs-autofs4
   URL:=http://www.openwrt.org
 endef