ARM: pxa: fix wrong parsing gpio event on spitz

(~GPLR0 & GPIO_bit(SPITZ_GPIO_KEY_INT)) | (GPLR0 &
GPIO_bit(SPITZ_GPIO_SYNC));

After using gpio_get_value, the statement should be in below.
((!gpio_get_value(SPITZ_GPIO_KEY_INT)
	<< GPIO_bit(SPITZ_GPIO_KEY_INT))
	| gpio_get_value(SPITZ_GPIO_SYNC));

Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com>