msm: kgsl: Set the secure vmid domain attribute

Pass the secure pixel vmid for the secure context banks in domain
attributes. The secure pagetable resides in stage 1 HLOS and needs
to be moved to stage 2 Hypervisor. The SMMU driver takes care of
this by looking at the domain attribute.

Change-Id: I9cefcefb92b59afb2ac0dab53d4102682e07f904
Signed-off-by: Shrenuj Bansal <shrenujb@codeaurora.org>