pkg/openthread: move dependencies to pkg Makefile.dep

Makefile.dep

@@ -653,11 +653,6 @@ ifneq (,$(filter random,$(USEMODULE)))
   USEMODULE += luid
 endif
 
-ifneq (,$(filter openthread_contrib,$(USEMODULE)))
-  USEMODULE += openthread_contrib_netdev
-  FEATURES_REQUIRED += cpp
-endif
-
 ifneq (,$(filter asymcute,$(USEMODULE)))
   USEMODULE += sock_udp
   USEMODULE += sock_util
@@ -731,11 +726,6 @@ ifneq (,$(filter gcoap,$(USEMODULE)))
   USEMODULE += sock_util
 endif
 
-ifneq (,$(filter openthread,$(USEPKG)))
-  USEMODULE += openthread_contrib
-  USEMODULE += mbedcrypto
-endif
-
 ifneq (,$(filter luid,$(USEMODULE)))
   FEATURES_OPTIONAL += periph_cpuid
 endif

pkg/openthread/Makefile.dep

+ifneq (,$(filter openthread,$(USEPKG)))
+  USEMODULE += openthread_contrib
+  USEMODULE += mbedcrypto
+endif
+
+ifneq (,$(filter openthread_contrib,$(USEMODULE)))
+  USEMODULE += openthread_contrib_netdev
+  USEMODULE += xtimer
+  FEATURES_REQUIRED += cpp
+endif