cnss2: Add DOMAIN_ATTR_GEOMETRY attribute support

Use DOMAIN_ATTR_GEOMETRY domain attribute if it is configured in DTS,
to explicitly set the IOVA range for fastmap.
It will ensure that fastmap only allocates memory in its page tables
for the IOVA range declared by CNSS.

Change-Id: Ie81f11db949728c2fb85154049101271df21313d
CRs-Fixed: 2687286
Signed-off-by: Lin Bai <lbai@codeaurora.org>