irqchip/gic-v3-its: fix some definitions of inner cacheability attributes

Some definitions of Inner Cacheability attibutes need to be corrected.

Fixes: 8c828a53 ("irqchip/gicv3-its: Restore all cacheability attributes")
Signed-off-by: Hongbo Yao <yaohongbo@huawei.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>