arm64/ascend: set the correct dvpp mmap area when no MAP_DVPP flags

ascend inclusion
category: feature
bugzilla: NA
CVE: NA

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The commit 4daf80d7164 ("arm64/ascend: Enable...") missed to set the
correct dvpp mmap area when the user didn't set the MAP_DVPP flags,
so add new area zone to fix this.

And fix some coding style, rename the enable_map_dvpp to
enable_mmap_dvpp.

v2: return true if the input addr is DVPP_MMAP_BASE for dvpp_mmap_zone.

Fixes: 4daf80d7164 ("arm64/ascend: Enable DvPP mmap features for Ascend Platform")
Signed-off-by: Ding Tianhong <dingtianhong@huawei.com>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>