soc/intel/skylake: Drop always-zero PowerLimit4 dt setting

Unset devicetree settings default to zero, so the devicetree setting can
be removed. Looks like no one needs it anyway.

Change-Id: Iad94538c5465347b37a99c6c9f20988168661593
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48575
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Michael Niewöhner <foss@mniewoehner.de>
Reviewed-by: Furquan Shaikh <furquan@google.com>
diff --git a/src/soc/intel/skylake/chip.c b/src/soc/intel/skylake/chip.c
index 3eb72fa..c9519cd 100644
--- a/src/soc/intel/skylake/chip.c
+++ b/src/soc/intel/skylake/chip.c
@@ -303,7 +303,7 @@
 
 	tconfig->PchLockDownGlobalSmi = config->LockDownConfigGlobalSmi;
 	tconfig->PchLockDownRtcLock = config->LockDownConfigRtcLock;
-	tconfig->PowerLimit4 = config->PowerLimit4;
+	tconfig->PowerLimit4 = 0;
 	/*
 	 * To disable HECI, the Psf needs to be left unlocked
 	 * by FSP till end of post sequence. Based on the devicetree