cnss2: Set no_d3hot flag to avoid PCIe framework saving config space

CNSS driver is already saving PCIe config space as part of suspend and
resume. There is no need for PCIe framework to do it again. This is
able to improve suspend/resume KPI.

Change-Id: I940959ec93c435b9fd711c5e75a8bbc40ec916ad
Signed-off-by: Yue Ma <yuem@codeaurora.org>