strongswan: add kernel module dependency on chapoly

Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com>
(cherry picked from commit 6a30ed6fbd)

net/strongswan/Makefile

@@ -670,7 +670,7 @@ $(eval $(call BuildPlugin,attr-sql,SQL based config,+strongswan-charon))
 $(eval $(call BuildPlugin,bliss,BLISS crypto,+strongswan-libnttfft +strongswan-mod-mgf1 +strongswan-mod-hmac))
 $(eval $(call BuildPlugin,blowfish,Blowfish crypto,))
 $(eval $(call BuildPlugin,ccm,CCM AEAD wrapper crypto,))
-$(eval $(call BuildPlugin,chapoly,ChaCha20-Poly1305 AEAD crypto,))
+$(eval $(call BuildPlugin,chapoly,ChaCha20-Poly1305 AEAD crypto,+kmod-crypto-chacha20poly1305))
 $(eval $(call BuildPlugin,cmac,CMAC crypto,))
 $(eval $(call BuildPlugin,connmark,netfilter connection marking,+libip4tc))
 $(eval $(call BuildPlugin,constraints,advanced X509 constraint checking,))