accel/amdxdna: Add GEM buffer object management

There different types of BOs are supported:

- shmem
A user application uses shmem BOs as input/output for its workload running
on NPU.

- device memory heap
The fixed size buffer dedicated to the device.

- device buffer
The buffer object allocated from device memory heap.

- command buffer
The buffer object created for delivering commands. The command buffer
object is small and pinned on creation.

New IOCTLs are added: CREATE_BO, GET_BO_INFO, SYNC_BO. SYNC_BO is used
to explicitly flush CPU cache for BO memory.

Co-developed-by: Min Ma <min.ma@amd.com>
Signed-off-by: Min Ma <min.ma@amd.com>
Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Signed-off-by: Lizhi Hou <lizhi.hou@amd.com>
Signed-off-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241118172942.2014541-7-lizhi.hou@amd.com