[S390] zcrypt: Comments and kernel-doc cleanup

Comments, which suggested to be kernel-doc but were not in the right
formatting, have been corrected. Additionally some minor cleanup in
the comments has been done.

Signed-off-by: Felix Beck <felix.beck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
diff --git a/drivers/s390/crypto/zcrypt_error.h b/drivers/s390/crypto/zcrypt_error.h
index 2cb616b..3e27fe7 100644
--- a/drivers/s390/crypto/zcrypt_error.h
+++ b/drivers/s390/crypto/zcrypt_error.h
@@ -108,7 +108,7 @@
 		return -EINVAL;
 	case REP82_ERROR_MESSAGE_TYPE:
 	//   REP88_ERROR_MESSAGE_TYPE		// '20' CEX2A
-		/**
+		/*
 		 * To sent a message of the wrong type is a bug in the
 		 * device driver. Warn about it, disable the device
 		 * and then repeat the request.