cnss_genl: Use new structure for genl

There's a structure change in genl family and genl operations.
Adjust cnss_genl driver according to the new structure.

Change-Id: I8632b9f622898be2b51e144f6af5cadeef24efca
CRs-Fixed: 2555300
Signed-off-by: Yuanyuan Liu <yuanliu@codeaurora.org>