drm/i915/gen11: Add additional pcode status values

I don't think we've ever hit these new error codes, but they're
documented in the gen11 pcode document, so we might as well add them to
the handler.

Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200111014511.2988923-1-matthew.d.roper@intel.com
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>