udmabuf: introduce udmabuf init and deinit helper

After udmabuf is allocated, its resources need to be initialized,
including various array structures. The current array structure has
already been greatly expanded.

Also, before udmabuf needs to be kfree, the occupied resources need to
be released.

This part is repetitive and maybe overlooked.

This patch give a helper function when init and deinit, by this,
reduce duplicate code.

Signed-off-by: Huan Yang <link@vivo.com>
Acked-by: Vivek Kasireddy <vivek.kasireddy@intel.com>
Signed-off-by: Vivek Kasireddy <vivek.kasireddy@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240918025238.2957823-6-link@vivo.com