ANDROID: KVM: arm64: Fix prot for __pkvm_host_use_dma_page

pkvm_mkstate expects prot and state to create a prot(including SW bits)
to be mapped in the page table, however the wrong macro for MMIO was
used which was the full PTE instead of prot.

Bug: 277989609
Bug: 278749606

Change-Id: I6e907d2010a699bc9690039929562e78a33198cc
Signed-off-by: Mostafa Saleh <smostafa@google.com>