Change in coreboot[master]: mb/prodrive/hermes: Configure pink rear vref based on eeprom

[Justin van Son (Code Review)]

Attention is currently required from: Christian Walter, Angel Pons, Arthur Heymans.
Justin van Son has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/58879 )

Change subject: mb/prodrive/hermes: Configure pink rear vref based on eeprom
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Patch Set 1: Code-Review+1

(3 comments)

Patchset:

PS1: 
Looks good

File src/mainboard/prodrive/hermes/variants/r04/hda_verb.c:

https://review.coreboot.org/c/coreboot/+/58879/comment/9b7e5741_d15624d4 
PS1, Line 82: 	const u32 internal_config = get_internal_audio_cfg(board_cfg->internal_audio_connection);
> > line over 96 characters […]

actually, you can name it front_panel. Customer asked for more clear setting name

https://review.coreboot.org/c/coreboot/+/58879/comment/c9455e97_7f617057 
PS1, Line 89: 		get_port_c_vref_cfg(board_cfg->blue_rear_vref),
> Hmmm, this one is probably wrong then

No, this one uses some kind of hidden register in the codec. Realtek provided the registers here