[S] Change in coreboot[master]: mb/google/myst: Enable iommu

[Jon Murphy (Code Review)]

Jon Murphy has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/74177 )

Change subject: mb/google/myst: Enable iommu
......................................................................

mb/google/myst: Enable iommu

Enable iommu in devicetree for myst in order to allow kernel to load and
initialize IOMMU.

Bug=b:276805280
TEST=builds

Signed-off-by: Jon Murphy 
Change-Id: I94e93afe775b070253464a9d187ad6c028d1b811
---
M src/mainboard/google/myst/variants/baseboard/devicetree.cb
1 file changed, 17 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/77/74177/1

diff --git a/src/mainboard/google/myst/variants/baseboard/devicetree.cb b/src/mainboard/google/myst/variants/baseboard/devicetree.cb
index 7980101..10d022d 100644
--- a/src/mainboard/google/myst/variants/baseboard/devicetree.cb
+++ b/src/mainboard/google/myst/variants/baseboard/devicetree.cb
@@ -6,6 +6,7 @@
    			device pnp 0c09.0 alias chrome_ec on end
    		end
    	end
+		device ref iommu on end
    end # domain
    device ref uart_0 on end # UART0
 end	# chip soc/amd/phoenix