tree: Replace Or(a,b) with ASL 2.0 syntax

Replace `Or (a, b)` with `a | b`.

Change-Id: I73842cd4843ebb0b48440059ae9dcf6c82235a76
Signed-off-by: Felix Singer <felixsinger@posteo.net>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/70845
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Elyes Haouas <ehaouas@noos.fr>

src/drivers/intel/gma/acpi/configure_brightness_levels.asl

@@ -58,7 +58,7 @@
 				Local1 = 255
 			}
 			/* also set valid bit */
-			BCLP = Or (Local1, 0x80000000)
+			BCLP = Local1 | 0x80000000
 
 			If (ARDY == 0)
 			{