[ARM] pxa/MioA701: fix memory corruption.

In the resume bootstrap, the early disable address is wrong.
Fix it to RAM address 0xa020b000 instead of 0xa0200000, and
make it consistent with RESUME_ENABLE_ADDR in mioa701.c.

Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Eric Miao <eric.miao@marvell.com>