drm/i915/huc: Fix HuC register used in debugfs

drm/i915/huc: Fix HuC register used in debugfs

We report HuC status in debugfs using register read, but
we missed that on Gen11+ HuC uses different register.
Use correct one.

While here, correct placement of the colon.

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20200330113338.1713-1-michal.wajdeczko@intel.com