xfrm: alg_key_len & alg_icv_len should be unsigned

In commit ba749ae9 ([XFRM]: alg_key_len
should be unsigned to avoid integer divides
<http://git2.kernel.org/?p=linux/kernel/git/davem/net-2.6.git;a=commitdiff;h=ba749ae98d5aa9d2ce9a7facde0deed454f92230>)
alg_key_len field of struct xfrm_algo was converted to unsigned int to
avoid integer divides.

Then Herbert in commit 1a6509d9
([IPSEC]: Add support for combined mode algorithms) added a new
structure xfrm_algo_aead, that resurrected a signed int for alg_key_len
and re-introduce integer divides.

This patch avoids these divides and saves 64 bytes of text on i386.
Signed-off-by: NEric Dumazet <dada1@cosmosbay.com>
Acked-by: NHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

include/linux/xfrm.h

@@ -98,8 +98,8 @@ struct xfrm_algo {
 
 struct xfrm_algo_aead {
 	char		alg_name[64];
-	int	alg_key_len;	/* in bits */
-	int	alg_icv_len;	/* in bits */
+	unsigned int	alg_key_len;	/* in bits */
+	unsigned int	alg_icv_len;	/* in bits */
 	char		alg_key[0];
 };