Change in coreboot[master]: drivers/intel/gma: Define structure for Opregion version

[Furquan Shaikh (Code Review)]

Attention is currently required from: Meera Ravindranath, Patrick Rudolph.
Furquan Shaikh has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/56168 )

Change subject: drivers/intel/gma: Define structure for Opregion version
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Patch Set 4:

(1 comment)

File src/drivers/intel/gma/opregion.c:

https://review.coreboot.org/c/coreboot/+/56168/comment/40b79b46_999b1835 
PS3, Line 357: opregion->header.version = IGD_OPREGION_VERSION << 24;
> Done that in the next CL here as I had to update the function of setting version - […]

Yes, we would need that function in this CL to ensure we don't break the current behavior with this CL. You can start with this in current CL :

```
/* Function to set the IGD Opregion version */
static void opregion_set_version(opregion_header_t *opheader)
{
    opheader->over.major = 2;
    opheader->over.minor = 0;
    opheader->over.rsvd = 0;
    opheader->over.revision = 0;
}
```

and update with the config checks in next CL.