RDMA/hns: Apply XArray for Bond ID allocation

driver inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I6Z4E9



---------------------------------------------------------------

This patch provides the ability to map an integer ID to a bond
group pointer by:
	1. adding a new struct hns_roce_die_info to store the
	   pointers and IDs of bond groups on a specific I/O die.
	2. applying XArray to map the bus number to the die info struct.

Signed-off-by: Junxian Huang <huangjunxian6@hisilicon.com>