[ARM] 4055/1: iop13xx: fix phys_io/io_pg_offst for iq81340mc/sc

The phys_io/io_pg_offst machine record variables were being set
to bogus values, causing problems when enabling DEBUG_LL.

Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>