nfs-utils: use <pkg>_INSTALL_INIT_SYSV mechanism

Also move back the NFS_UTILS_INSTALL_FIXUP hook registration right
after the hook definition.

[Peter: use install -D as noted by Yann]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/nfs-utils/nfs-utils.mk

@@ -35,17 +35,20 @@ NFS_UTILS_CONF_OPTS += --disable-tirpc
 endif
 
 define NFS_UTILS_INSTALL_FIXUP
-	$(INSTALL) -m 0755 package/nfs-utils/S60nfs \
-		$(TARGET_DIR)/etc/init.d/S60nfs
 	rm -f $(NFS_UTILS_TARGETS_)
 endef
 
+NFS_UTILS_POST_INSTALL_TARGET_HOOKS += NFS_UTILS_INSTALL_FIXUP
+
+define NFS_UTILS_INSTALL_INIT_SYSV
+	$(INSTALL) -D -m 0755 package/nfs-utils/S60nfs \
+		$(TARGET_DIR)/etc/init.d/S60nfs
+endef
+
 define NFS_UTILS_REMOVE_NFSIOSTAT
 	rm -f $(TARGET_DIR)/usr/sbin/nfsiostat
 endef
 
-NFS_UTILS_POST_INSTALL_TARGET_HOOKS += NFS_UTILS_INSTALL_FIXUP
-
 # nfsiostat is interpreted python, so remove it unless it's in the target
 NFS_UTILS_POST_INSTALL_TARGET_HOOKS += $(if $(BR2_PACKAGE_PYTHON),,NFS_UTILS_REMOVE_NFSIOSTAT)