NVMEDevice: Eliminate virt to physical address translation in data_buf_next_sge

NVMEDevice: Eliminate virt to physical address translation in data_buf_next_sge

After SPDK is updated, SPDK requires virtual address
instead of physical address in huge page memory. Thus,
we do not need to pass the physical address since SPDK
library will do the address translation work.If we
still use the original code, it seems a bug.

In this patch, we will also use spdk_zmalloc instead of
dpdk's rte_malloc_socket function.

Signed-off-by: optimistyzy <optimistyzy@gmail.com>