kernel: crypto: add kmod-crypto-chacha20poly1305

Needed by strongSwan IPsec VPN for strongswan-mod-chapoly. Not to be confused with
kmod-crypto-LIB-chacha20poly1305, which is an 8-byte nonce version used
by wireguard.

Signed-off-by: Xu Wang <xwang1498@gmx.com>

package/kernel/linux/modules/crypto.mk

@@ -101,6 +101,18 @@ endef
 $(eval $(call KernelPackage,crypto-ccm))
 
 
+define KernelPackage/crypto-chacha20poly1305
+  TITLE:=ChaCha20-Poly1305 AEAD support, RFC7539 (used by strongSwan IPsec VPN)
+  DEPENDS:=+kmod-crypto-aead +kmod-crypto-manager
+  KCONFIG:=CONFIG_CRYPTO_CHACHA20POLY1305
+  FILES:=$(LINUX_DIR)/crypto/chacha20poly1305.ko
+  AUTOLOAD:=$(call AutoLoad,09,chacha20poly1305)
+  $(call AddDepends/crypto)
+endef
+
+$(eval $(call KernelPackage,crypto-chacha20poly1305))
+
+
 define KernelPackage/crypto-cmac
   TITLE:=Support for Cipher-based Message Authentication Code (CMAC)
   DEPENDS:=+kmod-crypto-hash