soc/intel/xeon_sp/acpi: Rename pci_irq.asl

Rename pci_irq.asl to pci_irqs.asl to match other intel soc file
names. This makes comparing differences much easier.

Change-Id: I622dfef675c3df2dff7a3024ccbe14c356a5cd86
Signed-off-by: Marc Jones <marcjones@sysproconsulting.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45834
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/intel/xeon_sp/acpi/uncore.asl

@@ -26,7 +26,7 @@ Scope(\)
 
 Scope (\_SB)
 {
-	#include "pci_irq.asl"
+	#include "pci_irqs.asl"
 	#include "uncore_irq.asl"
 	#include "iiostack.asl"
 }