rpcgss: simplify make_checksum

We're doing some pointless translation between krb5 constants and kernel
crypto string names.

Also clean up some related spkm3 code as necessary.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/net/sunrpc/auth_gss/gss_krb5_seal.c b/net/sunrpc/auth_gss/gss_krb5_seal.c
index 2bc2277..c187f7f 100644
--- a/net/sunrpc/auth_gss/gss_krb5_seal.c
+++ b/net/sunrpc/auth_gss/gss_krb5_seal.c
@@ -108,7 +108,7 @@
 	*(__be16 *)(krb5_hdr + 2) = htons(SGN_ALG_DES_MAC_MD5);
 	memset(krb5_hdr + 4, 0xff, 4);
 
-	if (make_checksum(CKSUMTYPE_RSA_MD5, krb5_hdr, 8, text, 0, &md5cksum))
+	if (make_checksum("md5", krb5_hdr, 8, text, 0, &md5cksum))
 		goto out_err;
 
 	if (krb5_encrypt(ctx->seq, NULL, md5cksum.data,