Change in coreboot[master]: purism/librem13: Disable L1 sub states support

[Youness Alaoui (Code Review)]

Youness Alaoui has uploaded a new change for review. ( https://review.coreboot.org/19900 )

Change subject: purism/librem13: Disable L1 sub states support
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purism/librem13: Disable L1 sub states support

Some NVMe devices (Intel 600p series for example) seem to lock up
in D3 drive power state (L1.2 PCIe power state).
Disabling L1 substates fixes it.

Change-Id: I00a327dc91d443beb565fe4e72aaf816e40a007c
Signed-off-by: Youness Alaoui 
---
M src/mainboard/purism/librem13/Kconfig
1 file changed, 3 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/00/19900/1

diff --git a/src/mainboard/purism/librem13/Kconfig b/src/mainboard/purism/librem13/Kconfig
index 747e5ad..e63a7a1 100644
--- a/src/mainboard/purism/librem13/Kconfig
+++ b/src/mainboard/purism/librem13/Kconfig
@@ -21,6 +21,9 @@
      This platform does not have any way to get standard
      serial output so disable it by default.

+config PCIEXP_L1_SUB_STATE
+	def_bool n
+
 config HAVE_IFD_BIN
    bool
    default n