soc/intel/cannonlake/acpi: Replace Add(a,b) with ASL 2.0 syntax

Replace `Add (a, b)` with `a + b`.

Change-Id: I90dc0ecb1e3f16874a72cdf01afb097d4e7b6076
Signed-off-by: Felix Singer <felixsinger@posteo.net>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/60503
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/intel/cannonlake/acpi/gpio.asl

@@ -92,7 +92,7 @@ Method (GADD, 1, NotSerialized)
 	}
 	Store (PCRB (Local0), Local2)
 	Local2 += PAD_CFG_BASE
-	Return (Add (Local2, Multiply (Local1, 16)))
+	Return (Local2 + Multiply (Local1, 16))
 }
 
 /*

src/soc/intel/cannonlake/acpi/gpio_cnp_h.asl

@@ -92,5 +92,5 @@ Method (GADD, 1, NotSerialized)
 	}
 	Store (PCRB (Local0), Local2)
 	Local2 += PAD_CFG_BASE
-	Return (Add (Local2, Multiply (Local1, 16)))
+	Return (Local2 + Multiply (Local1, 16))
 }

src/soc/intel/cannonlake/acpi/xhci.asl

@@ -19,8 +19,7 @@ Method (UPWE, 3, Serialized)
 	Local0 = Arg1 + ((Arg0 - 1) * 0x10)
 
 	/* Map ((XMEM << 16) + Local0 in PSCR */
-	OperationRegion (PSCR, SystemMemory,
-			 Add (ShiftLeft (Arg2, 16), Local0), 0x10)
+	OperationRegion (PSCR, SystemMemory, ShiftLeft (Arg2, 16) + Local0, 0x10)
 	Field (PSCR, DWordAcc, NoLock, Preserve)
 	{
 		PSCT, 32,