Change in coreboot[master]: [WIP] drv/intel/gma/opregion: Add common init_idg_opregion()

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Change subject: [WIP] drv/intel/gma/opregion: Add common init_idg_opregion()
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Patch Set 3: Verified+1

Build Successful

https://qa.coreboot.org/job/coreboot-checkpatch/14658/ : SUCCESS

https://qa.coreboot.org/job/coreboot-gerrit/59347/ : SUCCESS