Change in coreboot[master]: soc/intel/common/block/pcie/rtd3: Add ModPHY power gate support for RTD3

[Subrata Banik (Code Review)]

Attention is currently required from: Cliff Huang, Maulik V Vaghela, Tim Wawrzynczak, Patrick Rudolph.
Subrata Banik has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/59855 )

Change subject: soc/intel/common/block/pcie/rtd3: Add ModPHY power gate support for RTD3
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Patch Set 4:

(1 comment)

File src/soc/intel/common/block/pcie/rtd3/rtd3.c:

https://review.coreboot.org/c/coreboot/+/59855/comment/61532410_de83fe35 
PS2, Line 238: 	static bool mutex_created;
> The default value would be false (because it's a static, it lives in .bss, not on the stack, and that gets zeroed when ramstage is loaded),

yes, that was my point too 😊
> but it's also harmless and I see both ways used in coreboot 👍

👍