mb/google/cyan/acpi: Replace Store(a,b) with ASL 2.0 syntax

Replace `Store (a, b)` with `b = a`.

Change-Id: I349d1e7d3027097c5db4da96e2376831fff61b04
Signed-off-by: Felix Singer <felixsinger@posteo.net>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/70683
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Elyes Haouas <ehaouas@noos.fr>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>

src/mainboard/google/cyan/variants/terra/include/variant/acpi/thermal.asl

@@ -6,7 +6,7 @@
 #if CONFIG(EC_SUPPORTS_DPTF_TEVT)
 Method (TEVT, 1, NotSerialized)
 {
-	Store (ToInteger (Arg0), Local0)
+	Local0 = ToInteger (Arg0)
 
 #ifdef DPTF_TSR0_SENSOR_ID
 	If (Local0 == DPTF_TSR0_SENSOR_ID) {