[M] Change in coreboot[master]: nb/intel/gm45: Export EDID-reading routine as a function

[Bill XIE (Code Review)]

Attention is currently required from: Arthur Heymans.

Bill XIE has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/74180 )

Change subject: nb/intel/gm45: Export EDID-reading routine as a function
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Patch Set 1:

(1 comment)

File src/northbridge/intel/gm45/gma.c:

https://review.coreboot.org/c/coreboot/+/74180/comment/5113b925_942febfd 
PS1, Line 161: /*
             : 	 * GTT base is at a 2M offset and is 2M big. If GTT is smaller than 2M
             : 	 * cycles are simply not decoded which is fine.
             : 	 */
             : 	pci_or_config16(dev, PCI_COMMAND, PCI_COMMAND_MASTER);
             : 	memset(mmio + 2 * MiB, 0, 2 * MiB);
             : 	pci_and_config16(dev, PCI_COMMAND, ~PCI_COMMAND_MASTER);
> This is not needed to get EDID. Move into func0_init.

But get_edid_str() may be called elsewhere. Won't PCI_COMMAND_MASTER being kept by GMA be problematic?