ARM: pxa/mioa701: use gpio arrays for global and gsm gpios

gpio_request_array() / gpio_free_array() are functional replacements for
mio_gpio_request() / mio_gpio_free(), which are now obsolete.

Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>