ec/purism/librem/acpi/ec.asl: Convert to ASL 2.0 syntax

Change-Id: Ic773f8404c24fc886e8420a5f4b3e00b2d752ba2
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49572
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Michael Niewöhner <foss@mniewoehner.de>
diff --git a/src/ec/purism/librem/acpi/ec.asl b/src/ec/purism/librem/acpi/ec.asl
index 143dd04..abdd8be 100644
--- a/src/ec/purism/librem/acpi/ec.asl
+++ b/src/ec/purism/librem/acpi/ec.asl
@@ -180,14 +180,14 @@
 	Method (_Q34)
 	{
 		TPSN (0x87)
-		XOr (^TPAD, One, ^TPAD)
+		^TPAD ^= 1
 	}
 
 	/* KEY_WLAN */
 	Method (_Q35)
 	{
 		TPSN (0x88)
-		XOr (^WIFI, One, ^WIFI)
+		^WIFI ^= 1
 	}
 
 	/* KEY_BLUETOOTH */