drm/i915/gvt: Allow F_CMD_ACCESS on mmio 0x21f0
The newly updated guest driver could program 0x21f0 via lri and srm, without F_CMD_ACCESS flag cmd parser will stop parser reset cmd. 0x21f0 applies to BDW, SKL, KBL, BXT and CFL. Reviewed-by: Yan Zhao <yan.y.zhao@intel.com> Signed-off-by: Colin Xu <colin.xu@intel.com> Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
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