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

Replace `Multiply (a, b)` with `a * b`.

Change-Id: I6dc9f57773754e89df4b4ffd088a4693af0452e3
Signed-off-by: Felix Singer <felixsinger@posteo.net>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/60565
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>

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

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