soc/intel/skylake: Rename PcieRpAspm devicetree config

This configuration option shares a name with the FSP UPD, but
is enumerated differently. Change its name to minimise confusion
about the options.

Change-Id: Id74f043ecd549bde4501320bff1dc080bde64057
Signed-off-by: Benjamin Doron <benjamin.doron00@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45001
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
diff --git a/src/mainboard/facebook/monolith/devicetree.cb b/src/mainboard/facebook/monolith/devicetree.cb
index 95e2565..bb11d06 100644
--- a/src/mainboard/facebook/monolith/devicetree.cb
+++ b/src/mainboard/facebook/monolith/devicetree.cb
@@ -151,7 +151,7 @@
 	# Enable Advanced Error Reporting
 	register "PcieRpAdvancedErrorReporting[2]" = "1"
 	# Disable Aspm
-	register "PcieRpAspm[2]" = "AspmDisabled"
+	register "pcie_rp_aspm[2]" = "AspmDisabled"
 
 	# PCIE Port 4 disabled
 	# PCIE Port 5 x1 -> MODULE i219
@@ -166,7 +166,7 @@
 	# Enable Advanced Error Reporting
 	register "PcieRpAdvancedErrorReporting[5]" = "1"
 	# Disable Aspm
-	register "PcieRpAspm[5]" = "AspmDisabled"
+	register "pcie_rp_aspm[5]" = "AspmDisabled"
 
 	# PCIE Port 7 Disabled
 	# PCIE Port 8 Disabled
@@ -184,7 +184,7 @@
 	# Enable Advanced Error Reporting
 	register "PcieRpAdvancedErrorReporting[8]" = "1"
 	# Disable Aspm
-	register "PcieRpAspm[8]" = "AspmDisabled"
+	register "pcie_rp_aspm[8]" = "AspmDisabled"
 
 	# USB 2.0 Enable all ports
 	register "usb2_ports[0]" = "USB2_PORT_TYPE_C(OC_SKIP)"	# USB-C Port 2