udpcast: actually use the hooks

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/udpcast/udpcast.mk

@@ -15,7 +15,7 @@ define UDPCAST_REMOVE_UDP_SENDER
 endef
 
 ifneq ($(BR2_PACKAGE_UDPCAST_SENDER),y)
-UDPCAST_HOOK_POST_INSTALL_TARGET_HOOKS += UDPCAST_REMOVE_UDP_SENDER
+UDPCAST_POST_INSTALL_TARGET_HOOKS += UDPCAST_REMOVE_UDP_SENDER
 endif
 
 define UDPCAST_REMOVE_UDP_RECEIVER
@@ -24,7 +24,7 @@ define UDPCAST_REMOVE_UDP_RECEIVER
 endef
 
 ifneq ($(BR2_PACKAGE_UDPCAST_RECEIVER),y)
-UDPCAST_HOOK_POST_INSTALL_TARGET_HOOKS += UDPCAST_REMOVE_UDP_RECEIVER
+UDPCAST_POST_INSTALL_TARGET_HOOKS += UDPCAST_REMOVE_UDP_RECEIVER
 endif
 
 $(eval $(call AUTOTARGETS,package,udpcast))