tree/acpi: Replace constant "Zero" with actual number

Change-Id: I5a3e3506415f424bf0fdd48fc449520a76622af5
Signed-off-by: Felix Singer <felixsinger@posteo.net>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/71525
Reviewed-by: Subrata Banik <subratabanik@google.com>
Reviewed-by: Elyes Haouas <ehaouas@noos.fr>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/soc/intel/skylake/acpi/systemagent.asl b/src/soc/intel/skylake/acpi/systemagent.asl
index f9b8f2d..5a15ac5 100644
--- a/src/soc/intel/skylake/acpi/systemagent.asl
+++ b/src/soc/intel/skylake/acpi/systemagent.asl
@@ -5,8 +5,8 @@
 
 Name (_HID, EisaId ("PNP0A08") /* PCI Express Bus */)  // _HID: Hardware ID
 Name (_CID, EisaId ("PNP0A03") /* PCI Bus */)  // _CID: Compatible ID
-Name (_SEG, Zero)  // _SEG: PCI Segment
-Name (_UID, Zero)  // _UID: Unique ID
+Name (_SEG, 0)  // _SEG: PCI Segment
+Name (_UID, 0)  // _UID: Unique ID
 
 Device (MCHC)
 {