ec/smsc/mec1308/acpi: Replace LEqual(a,b) with ASL 2.0 syntax

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

Change-Id: Ic58e22046aa13549747692f4b21184cf573aa4d3
Signed-off-by: Felix Singer <felixsinger@posteo.net>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/60669
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Sean Rhodes <sean@starlabs.systems>

src/ec/smsc/mec1308/acpi/battery.asl

@@ -63,7 +63,7 @@ Device (BAT0)
 		ShiftLeft (Arg0, 8, Local1)
 		And (Local1, 0xFF00, Local1)
 		Or (Local0, Local1, Local0)
-		If (LEqual (Local0, 0xFFFF)) {
+		If (Local0 == 0xFFFF) {
 			Store (0xFFFFFFFF, Local0)
 		}
 		Return (Local0)