ec/quanta/it8518/acpi: Replace LNot() with ASL 2.0 syntax

Replace `LNot (a)` with `!a`.

Change-Id: I98ac7a9c1cd16609cf6bd38e1bd9bf8cf54817fb
Signed-off-by: Felix Singer <felixsinger@posteo.net>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/60595
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>

src/ec/quanta/it8518/acpi/battery.asl

@@ -275,7 +275,7 @@ Device (BATX)
 		}
 		Else
 		{
-			If (LNot (AND (Local0, 2)))
+			If (!(AND (Local0, 2)))
 			{
 				// Battery is not charging
 				Store (Zero, Local1)
@@ -306,7 +306,7 @@ Device (BATX)
 			Store (ECRC, Local1)
 		}
 
-		If (BFWK && ACPW && LNot (Local0))
+		If (BFWK && ACPW && !Local0)
 		{
 			// On AC power and battery is neither charging
 			// nor discharging.  Linux expects a full battery