Revert "crypto: talitos - convert to use be16_add_cpu()"

This reverts commit 7291a932c6e27d9768e374e9d648086636daf61c.

The conversion to be16_add_cpu() is incorrect in case cryptlen is
negative due to premature (i.e. before addition / subtraction)
implicit conversion of cryptlen (int -> u16) leading to sign loss.

Cc: <[e-mail]> # 3.10+
Cc: Wei Yongjun <[e-mail]>
Signed-off-by: Horia Geanta <[e-mail]>
Signed-off-by: Herbert Xu <[e-mail]>

drivers/crypto/talitos.c

···
 		sg_count--;
 		link_tbl_ptr--;
 	}
-	be16_add_cpu(&link_tbl_ptr->len, cryptlen);
+	link_tbl_ptr->len = cpu_to_be16(be16_to_cpu(link_tbl_ptr->len)
+					+ cryptlen);
 
 	/* tag end of link table */
 	link_tbl_ptr->j_extent = DESC_PTR_LNKTBL_RETURN;