gvt-next-2020-09-10

- Cleanup command access flag (Yan)
- New workaround cmd access fix (Colin)
- MIA reset state fix (Colin)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
From: Zhenyu Wang <zhenyuw@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200910053720.GK28614@zhen-hp.sh.intel.com