[CRYPTO] blkcipher: Fix inverted test in blkcipher_get_spot

The previous patch had the conditional inverted.  This patch fixes it
so that we return the original position if it does not straddle a page.

Thanks to Bob Gilligan for spotting this.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/blkcipher.c

@@ -65,7 +65,7 @@ static inline void blkcipher_unmap_dst(struct blkcipher_walk *walk)
 static inline u8 *blkcipher_get_spot(u8 *start, unsigned int len)
 {
 	u8 *end_page = (u8 *)(((unsigned long)(start + len - 1)) & PAGE_MASK);
-	return start < end_page ? start : end_page;
+	return start > end_page ? start : end_page;
 }
 
 static inline unsigned int blkcipher_done_slow(struct crypto_blkcipher *tfm,