superio/winbond/w83667hg-a: Replace LEqual(a,b) with ASL 2.0 syntax

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

Change-Id: I033f73e6552746c6899e46ee4d619ab47cb3d55b
Signed-off-by: Felix Singer <felixsinger@posteo.net>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/60659
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Sean Rhodes <sean@starlabs.systems>

src/superio/winbond/w83667hg-a/ps2_controller.asl

@@ -54,7 +54,7 @@
 			/* Restore default SuperIO access */
 			Store(0xAA, SIOI)
 
-			if (LEqual(Local0, 0x0)) {
+			if (Local0 == 0) {
 				/* Mouse function selected */
 				Return (0xf)
 			}