mb/siemens/mc_ehl5: Remove DDI settings from devicetree

Since this mainboard no longer uses the FSP GOP driver, the DDI port
settings are no longer necessary. The GOP driver was used in the initial
phase of development where we used Tianocore as payload for some test
cases. Finally, this mainboard uses a self-made Linux payload, which
does the graphic initialization.

BUG=none
TEST=Boot into Linux and check if graphic works correctly

Change-Id: Ie9e135fbc2627546d6ef95d7d5ff3e9a9222b5d2
Signed-off-by: Mario Scheithauer <mario.scheithauer@siemens.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/82663
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-by: Uwe Poeche <uwe.poeche@siemens.com>
Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de>
diff --git a/src/mainboard/siemens/mc_ehl/variants/mc_ehl5/devicetree.cb b/src/mainboard/siemens/mc_ehl/variants/mc_ehl5/devicetree.cb
index 43697be..8fe9b93 100644
--- a/src/mainboard/siemens/mc_ehl/variants/mc_ehl5/devicetree.cb
+++ b/src/mainboard/siemens/mc_ehl/variants/mc_ehl5/devicetree.cb
@@ -103,9 +103,6 @@
 	register "pse_tsn_phy_irq_edge[0]" = "RISING_EDGE"
 	register "pse_tsn_phy_irq_edge[1]" = "RISING_EDGE"
 
-	register "DdiPortAHpd" = "1"
-	register "DdiPortADdc" = "1"
-
 	register "common_soc_config" = "{
 		.i2c[1] = {
 			.speed = I2C_SPEED_STANDARD,