i915: Add HuC firmware v7.0.3 for TGL

First HuC FW release for TGL
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>

WHENCE

@@ -4003,6 +4003,9 @@ Version: Huc API/APB ver 9 release 0 for Elkhartlake
 File: i915/tgl_guc_35.2.0.bin
 Version: Guc API/APB ver 35 release 2 for Tigerlake
 
+File: i915/tgl_huc_7.0.3.bin
+Version: Huc API/APB ver 7 release 0 for Tigerlake
+
 License: Redistributable. See LICENSE.i915 for details
 
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