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/include/linux/sunrpc/gss_krb5.h b/include/linux/sunrpc/gss_krb5.h
index f680ed3..abfa1f3 100644
--- a/include/linux/sunrpc/gss_krb5.h
+++ b/include/linux/sunrpc/gss_krb5.h
@@ -116,7 +116,7 @@
 #define ENCTYPE_UNKNOWN         0x01ff
 
 s32
-make_checksum(s32 cksumtype, char *header, int hdrlen, struct xdr_buf *body,
+make_checksum(char *, char *header, int hdrlen, struct xdr_buf *body,
 		   int body_offset, struct xdr_netobj *cksum);
 
 u32 gss_get_mic_kerberos(struct gss_ctx *, struct xdr_buf *,