ARM: 9245/1: dump: show FDT region

Since commit 7a1be318 ("ARM: 9012/1: move device tree mapping out
of linear region"), FDT is placed between the end of the vmalloc region
and the start of the fixmap region, let's show it in dump.

Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>