IXP4xx: Fix ixp4xx_crypto little-endian operation.

Fixes the following on IXP425 little-endian:

NPE-C: firmware functionality 0x5, revision 0x2:1
alg: skcipher: Test 1 failed on encryption for ecb(des)-ixp4xx
00000000: 01 23 45 67 89 ab cd e7
alg: skcipher: Test 1 failed on encryption for ecb(des3_ede)-ixp4xx
00000000: 73 6f 6d 65 64 61 74 61
alg: skcipher: Test 1 failed on encryption for ecb(aes)-ixp4xx
00000000: 00 11 22 33 44 55 66 77 88 99 aa bb cc dd ee ff

Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>
Acked-by: Christian Hohnstaedt <chohnstaedt@innominate.com>

drivers/crypto/ixp4xx_crypto.c

@@ -97,8 +97,13 @@
 
 struct buffer_desc {
 	u32 phys_next;
+#ifdef __ARMEB__
 	u16 buf_len;
 	u16 pkt_len;
+#else
+	u16 pkt_len;
+	u16 buf_len;
+#endif
 	u32 phys_addr;
 	u32 __reserved[4];
 	struct buffer_desc *next;
@@ -106,17 +111,30 @@ struct buffer_desc {
 };
 
 struct crypt_ctl {
+#ifdef __ARMEB__
 	u8 mode;		/* NPE_OP_*  operation mode */
 	u8 init_len;
 	u16 reserved;
+#else
+	u16 reserved;
+	u8 init_len;
+	u8 mode;		/* NPE_OP_*  operation mode */
+#endif
 	u8 iv[MAX_IVLEN];	/* IV for CBC mode or CTR IV for CTR mode */
 	u32 icv_rev_aes;	/* icv or rev aes */
 	u32 src_buf;
 	u32 dst_buf;
+#ifdef __ARMEB__
 	u16 auth_offs;		/* Authentication start offset */
 	u16 auth_len;		/* Authentication data length */
 	u16 crypt_offs;		/* Cryption start offset */
 	u16 crypt_len;		/* Cryption data length */
+#else
+	u16 auth_len;		/* Authentication data length */
+	u16 auth_offs;		/* Authentication start offset */
+	u16 crypt_len;		/* Cryption data length */
+	u16 crypt_offs;		/* Cryption start offset */
+#endif
 	u32 aadAddr;		/* Additional Auth Data Addr for CCM mode */
 	u32 crypto_ctx;		/* NPE Crypto Param structure address */
 
@@ -652,6 +670,9 @@ static int setup_auth(struct crypto_tfm *tfm, int encrypt, unsigned authsize,
 
 	/* write cfg word to cryptinfo */
 	cfgword = algo->cfgword | ( authsize << 6); /* (authsize/4) << 8 */
+#ifndef __ARMEB__
+	cfgword ^= 0xAA000000; /* change the "byte swap" flags */
+#endif
 	*(u32*)cinfo = cpu_to_be32(cfgword);
 	cinfo += sizeof(cfgword);