[CRYPTO] ctr: Remove default M

NO other block mode is M by default.

Signed-off-by: Sebastian Siewior <sebastian@breakpoint.cc>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/crypto/Kconfig b/crypto/Kconfig
index 3f0bc0e..d9666e3 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -199,7 +199,6 @@
 	tristate "CTR support"
 	select CRYPTO_BLKCIPHER
 	select CRYPTO_MANAGER
-	default m
 	help
 	  CTR: Counter mode
 	  This block cipher algorithm is required for IPSec.