i915: Add HuC v7.7.1 for DG1

This is first release of HuC for DG1.
Signed-off-by: Anusha Srivatsa <anusha.srivatsa@intel.com>

WHENCE

@@ -4341,6 +4341,9 @@ Version: DMC API/APB ver 2 release 2 for DG1
 
 File: i915/dg1_guc_49.0.1.bin
 Version: Guc API/APB ver 49 release 0 for DG1
+
+File: i915/dg1_huc_7.7.1.bin
+Version: Huc API/APB ver 7 release 1 for DG1
 License: Redistributable. See LICENSE.i915 for details
 
 --------------------------------------------------------------------------