intel: add VLV L3 credits workaround to Gen7 GT path

local/recipes/gpu/redox-drm/source/src/drivers/intel/workarounds.rs

@@ -263,6 +263,9 @@ fn ivb_gt_workarounds_init(wal: &mut WorkaroundList) {
 
     /* WaForceL3Serialization:ivb */
     wa_write_clr(wal, GEN7_L3SQCREG4, L3SQ_URB_READ_CAM_MATCH_DISABLE, "WaForceL3Serialization");
+
+    /* WaIncreaseL3CreditsForVLVB0:vlv */
+    wa_write(wal, GEN7_L3SQCREG1, VLV_B0_WA_L3SQCREG1_VALUE, "WaIncreaseL3CreditsForVLVB0");
 }
 
 fn hsw_gt_workarounds_init(wal: &mut WorkaroundList) {