ANDROID: gunyah: Sync with latest "gunyah: vm_mgr: Add/remove user memory regions"

Align Gunyah memory parcel to Gunyah v12 patches posted to kernel.org.

We deviate from a perfect copy from kernel.org because:
 - in pages_are_mergeable, zone_device_pages_have_same_pgmap is not
   present in 6.1. Drop this check.

https://lore.kernel.org/all/20230509204801.2824351-11-quic_eberman@quicinc.com/



Bug: 279506910
Change-Id: I90ec2ac416b24bcc65635f27cae7665ce879783f
Signed-off-by: Elliot Berman <quic_eberman@quicinc.com>