Change in coreboot[master]: mb/amd/bilby: enable boot from NVMe SSD

[ritul guru (Code Review)]

Attention is currently required from: ritul guru, Felix Held.
Hello build bot (Jenkins), Marshall Dawson, Felix Held,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/51674

to look at the new patch set (#10).

Change subject: mb/amd/bilby: enable boot from NVMe SSD
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mb/amd/bilby: enable boot from NVMe SSD

These changes involve NVMe specific GPIO programming to enable pcie
NVMe SSD boot. Add nvme dev,func in devicetree and also remove
unused GPIOs programmed in Bilby.

Change-Id: I4407f82122c04b13684d4176ba5cd5a9fe03f0db
Signed-off-by: Ritul Guru 
---
M src/mainboard/amd/bilby/devicetree.cb
M src/mainboard/amd/bilby/early_gpio.c
M src/mainboard/amd/bilby/gpio.c
M src/mainboard/amd/bilby/port_descriptors.c
4 files changed, 48 insertions(+), 55 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/74/51674/10