mb/intel/tglrvp: sync up variant folders with latest up3

During intial UP4 patch, below UP3 patches merged which should be
applied for UP4.
https://review.coreboot.org/c/coreboot/+/39201
https://review.coreboot.org/c/coreboot/+/39229
Merge these patches to UP4

BUG=none
BRANCH=none
TEST=Build TGL UP4

Signed-off-by: Wonkyu Kim <wonkyu.kim@intel.com>
Change-Id: I7b24cb2b0d03309cf67c6c21ddc2031a054f6110
Reviewed-on: https://review.coreboot.org/c/coreboot/+/39419
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Caveh Jalali <caveh@chromium.org>
Reviewed-by: Srinidhi N Kaushik <srinidhi.n.kaushik@intel.com>
Reviewed-by: Shaunak Saha <shaunak.saha@intel.com>
diff --git a/src/mainboard/intel/tglrvp/variants/tglrvp_up4/devicetree.cb b/src/mainboard/intel/tglrvp/variants/tglrvp_up4/devicetree.cb
index a3539aa..1f05e0e 100644
--- a/src/mainboard/intel/tglrvp/variants/tglrvp_up4/devicetree.cb
+++ b/src/mainboard/intel/tglrvp/variants/tglrvp_up4/devicetree.cb
@@ -48,6 +48,7 @@
 	# enabling EDP in PortA
 	register "DdiPortAConfig" = "1"
 
+	register "DdiPortBHpd" = "1"
 	register "DdiPort1Hpd" = "1"
 	register "DdiPort1Ddc" = "1"