i915: Add DMC v2.07 for DG2

This release has a WA to prevent hang when DC states
are enabled.

Signed-off-by: Anusha Srivatsa <anusha.srivatsa@intel.com>

WHENCE

@@ -4685,6 +4685,9 @@ Version: GuC API/APB ver 70.1.2 for DG2
 File: i915/dg2_dmc_ver2_06.bin
 Version: DMC API/APB ver 2 release 6 for DG2
 
+File: i915/dg2_dmc_ver2_07.bin
+Version: DMC API/APB ver 2 release 7 for DG2
+
 License: Redistributable. See LICENSE.i915 for details
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