mainboard/intel/harcuvar: Remove hardcoded lapic 0 from devicetree.cb

This change follows other Intel SoCs common way to support SKUs with
bsp lapic_id != 0 by removing hardcoded lapic 0 from devicetree.cb and
allowing its detection at boottime. It completes support for HCV/DNV
after base SoC patch: commit ba936ce5db
soc/intel/denverton_ns: Ensure CPU device has a valid link

Link: https://mail.coreboot.org/hyperkitty/list/coreboot@coreboot.org/thread/YLMK2FBWWL6RKDNKBVZB3NJDYMEYHED7/
"A different lapic number in devicetree.cb needed for CPU with the same SKU and steping (Intel Atom C3538)."
Change-Id: I88f60f64d2beb2768ec9833de582d7901f456b11
Signed-off-by: Mariusz Szafrański <mariuszx.szafranski@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/57158
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: King Sumo <kingsumos@gmail.com>
Reviewed-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-by: Furquan Shaikh <furquan@google.com>

src/mainboard/intel/harcuvar/devicetree.cb

@@ -31,9 +31,7 @@ chip soc/intel/denverton_ns
 	register "ipc2" = "0x00000000" # IPC2
 	register "ipc3" = "0x00000000" # IPC3
 
-	device cpu_cluster 0 on
-		device lapic 0 on end
-	end
+	device cpu_cluster 0 on end
 
 	device domain 0 on
 		device pci 00.0 on end # Host Bridge