This patch takes snapshot for global regs, port regs, CQ, DQ, IOST, ITCT.

Add code for snapshot trig and generate dump directory.
Signed-off-by: NLuo Jiaxing <luojiaxing@huawei.com>
Signed-off-by: NJohn Garry <john.garry@huawei.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>