target/pscsi: Fix page increment

commit 472b72f2 upstream.

The page++ is wrong. It makes bio_add_pc_page() pointing to a wrong page
address if the 'while (len > 0 && data_len > 0) { ... }' loop is
executed more than one once.
Signed-off-by: Asias He <asias@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/target/target_core_pscsi.c

@@ -1042,7 +1042,6 @@ static int pscsi_map_sg(struct se_task *task, struct scatterlist *task_sg,
 				bio = NULL;
 			}
 
-			page++;
 			len -= bytes;
 			data_len -= bytes;
 			off = 0;