crypto: mips/chacha - select CRYPTO_SKCIPHER, not CRYPTO_BLKCIPHER

Another instance of CRYPTO_BLKCIPHER made it in just after it was
renamed to CRYPTO_SKCIPHER.  Fix it.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/Kconfig

@@ -1487,7 +1487,7 @@ config CRYPTO_CHACHA20_X86_64
 config CRYPTO_CHACHA_MIPS
 	tristate "ChaCha stream cipher algorithms (MIPS 32r2 optimized)"
 	depends on CPU_MIPS32_R2
-	select CRYPTO_BLKCIPHER
+	select CRYPTO_SKCIPHER
 	select CRYPTO_ARCH_HAVE_LIB_CHACHA
 
 config CRYPTO_SEED