mb/google/drallion: Set cpu_pl2_4_cfg to baseline for Drallion

Proper VR settings will be selected by CPU SKU and cpu_pl2_4_cfg.

BUG=b:148912093
BRANCH=None
TEST=build coreboot and checked IA_TDC from TAT tool.

Change-Id: Ie471dee0c70e1831a822860c0a44455772a2b8be
Signed-off-by: John Su <john_su@compal.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38811
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: EricR Lai <ericr_lai@compal.corp-partner.google.com>
Reviewed-by: Mathew King <mathewk@chromium.org>
diff --git a/src/mainboard/google/drallion/variants/drallion/devicetree.cb b/src/mainboard/google/drallion/variants/drallion/devicetree.cb
index 92f3fb9..cdb6288 100644
--- a/src/mainboard/google/drallion/variants/drallion/devicetree.cb
+++ b/src/mainboard/google/drallion/variants/drallion/devicetree.cb
@@ -65,6 +65,9 @@
 	register "PchHdaIDispCodecDisconnect" = "1"
 	register "PchHdaAudioLinkHda" = "1"
 
+	# Select CPU PL2/PL4 config
+	register "cpu_pl2_4_cfg" = "baseline"
+
 	# VR Settings Configuration for 2/4 Domains
 	#+----------------+-------+-------+-------+-------+
 	#| Domain/Setting |  SA   |  IA   | GTUS  |  GTS  |