[M] Change in coreboot[master]: drivers/intel/gma: Hook up libgfxinit in romstage

[Jérémy Compostella (Code Review)]

Attention is currently required from: Bora Guvendik, Zhixing Ma, Anil Kumar K, Hannah Williams, Cliff Huang, Tarun Tuli, Nico Huber, Michał Żygowski, Subrata Banik, Paul Menzel, Angel Pons, Arthur Heymans.

Jérémy Compostella has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/70276 )

Change subject: drivers/intel/gma: Hook up libgfxinit in romstage
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Patch Set 23:

(1 comment)

File src/soc/intel/common/block/graphics/graphics.c:

https://review.coreboot.org/c/coreboot/+/70276/comment/32c196d0_29c078bc 
PS23, Line 181: 	if (CONFIG(HWBASE_STATIC_MMIO)) {
> Should we note add some logic to prevent this being called in ramstage if we are making use of graph […]

Not really as the GOP driver uses its own BAR address anyway which is way more into the middle the 2GB memory hole.

```
[INFO]:[InitializeGfxMmioBase()]:[GfxMmio Base address: 0xAF000000]
```