sb,soc/amd: Rename PMOD to PICM in ASL

Use the same variable name as soc/intel to implement a common
_PIC method at top-level ASL.

Change-Id: I48f9e224d6d0101c2101be99cd18ff382738f0dd
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49903
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

src/southbridge/amd/agesa/hudson/acpi/pci_int.asl

@@ -109,7 +109,7 @@
 		{
 			\_SB.CIRQ()
 		}
-		Store(Arg0, PMOD)
+		Store(Arg0, PICM)
 	}
 
 	Method(CIRQ, 0x00, NotSerialized){

src/southbridge/amd/cimx/sb800/acpi/fch.asl

@@ -27,7 +27,7 @@ Method(_STA, 0) {
 }
 
 Method(_PRT,0) {
-	If(PMOD){ Return(APR0) }   /* APIC mode */
+	If(PICM){ Return(APR0) }   /* APIC mode */
 	Return (PR0)                  /* PIC Mode */
 } /* end _PRT */
 

src/southbridge/amd/cimx/sb800/acpi/pcie.asl

@@ -138,7 +138,7 @@ Scope(\_SB) {
 			{
 				\_SB.CIRQ()
 			}
-			Store(Arg0, PMOD)
+			Store(Arg0, PICM)
 		}
 
 		Method(CIRQ, 0x00, NotSerialized){

src/southbridge/amd/pi/hudson/acpi/pci_int.asl

@@ -109,7 +109,7 @@
 		{
 			\_SB.CIRQ()
 		}
-		Store(Arg0, PMOD)
+		Store(Arg0, PICM)
 	}
 
 	Method(CIRQ, 0x00, NotSerialized){