crypto: keywrap - enable compilation

Hook keywrap source code into Kconfig and Makefile
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/Kconfig

@@ -348,6 +348,13 @@ config CRYPTO_XTS
 	  key size 256, 384 or 512 bits. This implementation currently
 	  can't handle a sectorsize which is not a multiple of 16 bytes.
 
+config CRYPTO_KEYWRAP
+	tristate "Key wrapping support"
+	select CRYPTO_BLKCIPHER
+	help
+	  Support for key wrapping (NIST SP800-38F / RFC3394) without
+	  padding.
+
 comment "Hash modes"
 
 config CRYPTO_CMAC

crypto/Makefile

@@ -70,6 +70,7 @@ obj-$(CONFIG_CRYPTO_CTS) += cts.o
 obj-$(CONFIG_CRYPTO_LRW) += lrw.o
 obj-$(CONFIG_CRYPTO_XTS) += xts.o
 obj-$(CONFIG_CRYPTO_CTR) += ctr.o
+obj-$(CONFIG_CRYPTO_KEYWRAP) += keywrap.o
 obj-$(CONFIG_CRYPTO_GCM) += gcm.o
 obj-$(CONFIG_CRYPTO_CCM) += ccm.o
 obj-$(CONFIG_CRYPTO_CHACHA20POLY1305) += chacha20poly1305.o