[XS] Change in coreboot[master]: myst: Add PCIe shutdown workaround

[Jon Murphy (Code Review)]

Jon Murphy has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/75583?usp=email )

Change subject: myst: Add PCIe shutdown workaround
......................................................................

myst: Add PCIe shutdown workaround

On Myst, the FSP is shutting down the PCIe lanes that the SSD is
on.  Enable hotplug to force the FSP to keep the lanes active.

BUG=b:284213391
TEST=Boot to OS

Signed-off-by: Jon Murphy 
Change-Id: Iaf0aca329f05f15a3ce9edfa6a0e782c2edccabe
---
M src/mainboard/google/myst/port_descriptors.c
1 file changed, 4 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/83/75583/1

diff --git a/src/mainboard/google/myst/port_descriptors.c b/src/mainboard/google/myst/port_descriptors.c
index 6d0d0d6..12eba57 100644
--- a/src/mainboard/google/myst/port_descriptors.c
+++ b/src/mainboard/google/myst/port_descriptors.c
@@ -54,6 +54,8 @@
    .function_number = PCI_FUNC(NVME_DEVFN),
    .link_speed_capability = GEN_MAX,
    .turn_off_unused_lanes = true,
+	/* TODO(/284213391): Fix PCIe shutdown */
+	.link_hotplug = 3,
    .clk_req = CLK_REQ3,
 };

@@ -66,6 +68,8 @@
    .function_number = PCI_FUNC(NVME_DEVFN),
    .link_speed_capability = GEN_MAX,
    .turn_off_unused_lanes = true,
+	/* TODO(/284213391): Fix PCIe shutdown */
+	.link_hotplug = 3,
    .clk_req = CLK_REQ3,
 };