ec/librem/ec: Fix offset for Bluetooth enable (BTLE)

Test: boot OS (Ubuntu, Windows 10) on librem13v2, verify BT
function key toggle now works correctly.

Change-Id: I68dc99e72a09f7affbcd691d03dd4607a898313e
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/19897
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Youness Alaoui <snifikino@gmail.com>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Martin Roth <martinroth@google.com>
diff --git a/src/ec/purism/librem/acpi/ec.asl b/src/ec/purism/librem/acpi/ec.asl
index c87a4f7..e95f126 100644
--- a/src/ec/purism/librem/acpi/ec.asl
+++ b/src/ec/purism/librem/acpi/ec.asl
@@ -59,7 +59,7 @@
 		Offset (0x1D),
 		TPAD, 1,	/* Touchpad Enable/Disable */
 		WIFI, 1,	/* WiFi Enable/Disable */
-		, 2,
+		, 3,
 		BTLE, 1,	/* Bluetooth Enable/Disable */
 		Offset (0x25),
 		, 5,